While performing the activity if lead nitrate is not available, which of the following can be used in place of lead nitrate? d. oxygen is the excess reactant; there will be 0.5 moles oxygen remaining 3. When hydrogen is passed over copper oxide, copper and steam are formed. In which type of reaction does an exchange of partners take place?  Sodium  hydroxide  is oxidising agent and hydrochloric acid is reducing agent. After balancing, the above equation can be written as follows. Consider the reaction: BaCl2 + Na2CO3 arrow BaCO3 + 2NaCl. What is the limiting reactant in a typical Al... Toluene, C_6H_5CH_3, is oxidized by air under carefully controlled conditions to benzoic acid, C_6H_5CO_2H, which is used to prepare the food preservative sodium benzoate, C_6H_5CO_2Na. It results  in the  deterioration of the  metal to  form metal compounds by means  of chemical reactions with the environment.Corrosion is a simple electro chemical reaction. The reaction for the following unbalanced equation is performed in a lab. What is the percent bicarbonate in the tablet? Tick the correct answer. Suppose a computer manufacturer can build circuit boards according to the following process: 12 resistors + 20 insulators + 8 memory chips equals 4 circuit boards. Mn... How many grams of C a are needed to react completely with 2.20 L of a 4.50 M H C l solution? Starting with 0.88 g of elemental copper and 20 mL of 15 M nitric acid (18.9 g), what is the limiting reagent? During. How many grams of CO2 are produced from 18.5 g of propane gas? 2 HCl(aq) + Fe(s) -> H2(g) + FeCl2(aq. Which reagent is limiting? Answer : (i) Sodium (Na) is oxidised as it gains oxygen and oxygen gets reduced. When stored, it reacts with oxygen to. The Haber process for the production of ammonia is represented by 3H2(g) + N2(g) arrow 2NH3(g). Write a balanced equation for this reaction and state which of the chemicals are (i) elements (ii)compounds (iii) reactants (iv) products (v) metals (vi) non-metals. Suppose 55 g of octane is mixed with 150 g of oxygen. b. present in greater amount. #"% yield" = ("actual yield")/("theoretical yield") * 100%# So, let's say you want to do an experiment in the lab. Consider the balanced reaction given below. Write equations for these reactions. A silver article generally turns black when kept in the open for a few days. Virtually all the nitric acid manufactured commercially is obtained by the ammonia oxidization process. Suppose 3.92 g of sulfuric acid is mixed with 1.1 g of s... For the following unbalanced chemical equation, suppose exactly 5.0g of each reactant is taken. What is the limiting reactant for 0.8 Moles of CH3COOH and 0.001 Moles of NaHCO3? Question 2: Give an example of a double displacement reaction other than the one given in Activity 1.10. (a) Find the mass of CO_2 produced (b) Find the... 4.98 g of copper is produced when 2.92 g of Al are reacted with excess copper (II) sulfate. F e 2 O 3 ( s ) + 3 C ( s ) 2 F e ( s ) + 3 C O ( g ) . A 3.82 g sample of magnesium nitride is reacted with 7.73 g of water, according to the balanced equation below: Mg3N2 + 3H2O arrow 2NH3 + 3MgO. Which substance is in excess? (a) Four bikes could be built,... A student ignites 1.834 g of magnesium in air using a Bunsen burner in the lab. S b 2 S 3 + 3 F e 2 S b + 3 F e S When 15g of S b 2... Insoluble silver carbonate, A g 2 C O 3 ( s ) , forms in the following balanced chemical reaction: 2 A g N O 3 ( a q ) + K 2 C O 3 ( a q ) A g 2 C O 3 ( s ) + 2 K N O 3 ( a q ) . 1.90 g H2 is allowed to react with 9.87 g N2, producing 1.04 g NH3. What chemical reaction is involved in the corrosion of iron? (c) silver metal is added to copper sulphate solution? In the refining of silver, the recovery of silver from silver nitrate solution involved displacement by copper metal. 28.Which among the following is(are) double displacement reaction(s)? Hence, it is for this reason that chemical equations should be balanced. Considering the limiting reactant concept, how many moles of sodium chloride are produced from the reaction of 0.750 mol of sodium and 0.500 mol of chlorine gas? Reduction: Addition of hydrogen or metallic element or removal of oxygen or non-metallic element from a compound is called reduction. Answer : ‘X’ is copper (Cu) and the black-coloured compound formed is copper oxide (CuO). Which of the following reactions are exothermic and which are endothermic? Which is the limiting reactant in the reaction? 28. How can you explain that respiration is an exothermic reaction? Consider the balanced equation: 2CH4 + 4O2 to 2CO2 + 4H2O If 2.50 moles of each reactant is mixed together, how many moles of CO2 will be produced? 2H_2+ O_2 to 2H_2O The excess reactant is oxygen. (a) Name any two metals which can behave like metal X. Considering the limiting reactant, what is the mass of zinc sulfide (97.46 g/mol) produced from 0.750 g of zinc and 0.750 g of sulfur? Which is the limiting reactant when 3.00 mol of MnO_2 are reacted with 10.0 mol of HCl in the following equation? Combining 0.210 mol of Fe_2 O_3 with excess carbon produced 18.2 g of Fe. (iii) The pH of the resulting solution will be more than seven, (iv) The pH of the resulting solution will be less than seven. (2) (ii) Give a name for this type of reaction. It is believed that the reaction responsible for the depletion of ozone in the atmosphere is: O_3(g) + NO(g) ---> O_2(g) + NO_2(g) A. What types of events happen in chemical reactions that lead to percentage yields of less than 100%? Reducing  agent:  Compounds or  elements  which can cause  reduction are  called  reducing agents. If the number of moles for H2SO4 and NaOH are the same, which one is the limiting reactant? Why should chemical equations be balanced? (a) Hydrogen gas combines with nitrogen to form ammonia. A)... Fe_2O_3(S) + 3CO \to 2Fe(S) + 3CO_2 a) Identify the limiting reactant if 116 g of Fe_2O_3 reacts with 85.8 g of CO. b) How many grams of Fe is produced from the above reaction? If 50 mL of 0.15 M NaCl is mixed with 50 mL of 0.15 M AgNO_3, how many grams of AgCl will be theoretically formed? B) 6.21 g Fe. Hydrochloric acid is oxidized to  water, since oxygen is added to hydrogen  chloride  and  non-metallic  element  chloride  is  removed. On the other. How many grams of NH_3 can be produced from 4.15 mol of N_2 and excess H_2. 13.8 grams of salicylic acid reacts with 18.9 mL of acetic anhydride, (CH3CO)2O, in the presence of 0.4 mL of concentrated sulphuric acid (12.0 M), to give aspirin and acetic acid. (i) Solutions of barium chloride and sodium sulphate in water react to give insoluble barium sulphate and the solution of sodium chloride. Balanced Chemical Equation: A balanced chemical equation has number of atoms of each element equal on both sides. Chemical reactions are the processes in which new substances with new properties are formed. Sodium bicarbonate reacts with hydrochloric acid in a gas-forming reaction to produce aqueous sodium chloride, water, and carbon dioxide gas: NaHCO3(s) + HCl(aq) arrow NaCl(aq) + H2O(l) + CO2(g). This reaction generates B2O3 and H2O as the only products. In the refining of silver, silver is obtained from silver nitrate by using copper metal. In the above equation, name the compound which is oxidized and which is reduced? Aluminum reacts with chlorine gas to form aluminum chloride via the following reaction: 2Al(s) + 3Cl_2(g) => 2AlCl_3(s) You are given 24.0 g of aluminum and 29.0 g of chlorine gas. Why is respiration considered an exothermic reaction? of atoms in product. calcium hydroxide (aq) + hydrochloric acid (aq) calcium chloride (aq) + w... For the reaction shown, find the limiting reactant. 2Ag + O2 arrow 2AgO, If we start with 9.8 moles of Ba(NO3)2 and 4.7 moles of Li2SO3, how many grams of barium sulfite can we produced (theoretically speaking)? (d) Some bubbles of a gas are seen when lead (Pb) is reacted with the acid. (c) Neither gas is in excess. Zinc liberates hydrogen gas when reacted with dilute hydrochloric acid, whereas copper does not. When solution of barium chloride reacts with the solution of sodium sulphate, white precipitate of barium sulphate is formed along with sodium chloride. Grapes hanging on the plant do not ferment but after being plucked from the plant can be fermented. 0.27 mol b. Boric acid (H3BO3) and HCl(g) are formed when boron trichloride is bubbled through water. Write a balanced chemical equation for this reaction. Sodium sulfate and barium chloride react with each other to form sodium chloride and barium sulfate. Calcul... How many moles of H2 can be theoretically produced from 5 mol of Fe and 6 mol of H2O? Write the chemical reaction involved and also mention the type of the chemical reaction? What  type of reaction does occur when ammonia is allowed to react with hydrogen chloride? 3NaHCO_3(aq) + H_3C_6H_5O_7(aq) => 3CO_2(g) + 3H_2O(l) + Na3C_6H_5O_7(aq) A typical tablet contains 1000 mg citric acid and 1916 mg sodium bicarbonate. (What is the theoretical yield of Al2O3 in grams?) \\ 2S + 3O_2 \rightarrow 2SO_3.            4Fe + 3O2  →  2Fe2O3. Action of water in magnesium nitride. Determine the percent yield(with respect to CO_2 and CH_4) of the reaction if 1.25 g of CO_2 was formed by reacting 2.50 g of CH_4(g) with excess O_2 in the reaction: CH_4 (g) + O_2 (g) to CO_2 (g... Methanol, CH3OH, is made by causing carbon monoxide and hydrogen gases to react at high temperature and pressure. A general combination reaction can be represented by the chemical equation given here. a. (a) Corrosion (b) Rancidity. The other reactant, water, is both a weak acid and a weak base, so we can predict that an acid–base reaction will occur. Which one of the following statement(s) is(are) correct? On treatment with water it forms a solution which turns red litmus blue. CH_4 + 2O_2 \rightleftharpoons CO_2 + 2H_2O a. Write equations for these reactions? Which of the following gases can be used for storage of fresh sample of an oil for a long time? In the photosynthesis process, sugars are produced during the reaction of carbon with water. First, balance the reaction. Name the type of reaction involved when a zinc plate is dipped in a solution of copper sulphate? Another example of precipitation reaction is: In this reaction, barium sulphate is obtained as a precipitate. Write the chemical equation for the reaction that occurs. Like all alkali metals, lithium is highly reactive and flammable, and is stored in mineral oil. Then 14.0 g of copper is added to the solution. For the reaction 2SO2 + O2 arrow 2SO3, how many grams of SO3 can be formed if 48.0 grams of O2 are reacted and you have an unlimited amount of SO2? The oxidation of aluminum is a pretty common reaction and happens via the equation below. If you started the copper cycle lab with 10.23 mL of 0.540 mol/L solution of copper nitrate what is the percentage yield if in the final step you recover 0.065 g of copper? products, marked by unpleasant odour or flavour. If 30.0 grams of H2 is mixed with 10.0 grams of N2, what is the limiting reactant? Most of the decomposition reactions are exothermic. estion 1: Why does the colour of copper sulphate solution change when an iron nail is dipped in it? of atoms in reactant No. 2Al + 3CuSO_4 to Al_2(SO_4)_3 + 3Cu (a )What is the theoretical yield? Explain these observations giving suitable reasons.  For  convenience,  symbol  of  substance  is  used  to  represent  chemical equations. Predict the mass of N a 2 S 2 O 3 that could be produced from 38.2 g of N a 2 S and unlimited quantities of the other reactants based on the following unbalanced equation: N a 2 C O 3 + N a 2... 12 g of copper is treated with 19 g H N O 3 , which react to form N O according to the equation: 3 C u + 8 H N O 3 3 C u ( N O 3 ) 2 + 2 N O + 4 H 2 O . What would the percent yield be if only 26.2 g of lead(IV) bromide were actua... Ferrous sulfide + oxygen = Ferric oxide + sulfur dioxide \\ 1. Write an equation for decomposition reaction where energy is supplied in the form of heat/. How many parts of each kind are left over? V2O5 + 5Ca = 2V + CaO. and/or below the arrow of a chemical equation. Magnesium ribbon burns with a dazzling white flame and changes into a white powder. 3H2 + P2 arrow 2PH3. Name the gas evolved when a magnesium ribbon is dropped into dilute sulphuric acid? What is the theoretical yield of ammonia (in grams) if 17.25 grams of nitrogen gas and 10.75 grams of hydrogen gas are allowed to react? Reactio... How many moles of calcium chloride are theoretically produced for the following reaction given we have 2.6 moles of HCl and 1.4 moles of Ca(OH)2? Suppose 3.50 grams of BaCl2 is added to 2.00 grams of Na2CO3. (ii) In beakers A and B, endothermic process has occurred. Thus, bags used in packing food items are flushed with nitrogen gas to remove oxygen inside the pack. Given the following reaction CH₃OH + CO → HC₂H₃O₂ 1. 2BrF3(g) arrow Br2(g) + 3F2(g). What compound is the limiting reagent?   CHEMICAL REACTIONS AND EQUATIONS –OSB NOTES,         a) Combination reaction b) Decomposition reaction,        c) Displacement reaction d) Double decomposition reaction. Consider the following chemical process that is used to convert ammonia into nitrogen monoxide: NH3(g) + O2(g) -> NO(g) + H2O(g) a. Distinguish between the terms theoretical yield and actual yield. Solid calcium oxide reacts vigorously with water to form calcium hydroxide accompanied by liberation of heat. Al + HCl => AlCl_3 + H_2, Which reactant is in excess when 35.0 g of hydrogen is reacted with 276 g of oxygen to form water? If 63.8 grams of aluminum metal (Al) react with 72.3 grams of sulfur (S) in a synthesis reaction, how many grams of the excess reactant will be left over when the reaction is complete? If 150.0 g of SiO_2 are mixed 101.5 g of C and the reaction goes to compl... A hypothetical experiment consists of the mixing of yeast with glucose in water in a beaker. F e B r 3 ( a q ) + A g N O 3 ( a q ) F e ( N O 3 ) 3 ( a... What mass of silver bromide would be formed when 75.0 g of FeBr_3 and 65.0 g of Ag(NO_3)_3 are reacted? The article when rubbed with toothpaste again starts shining. Solid sodium and iron (III) oxide are one in a series of reactions that inflates a car airbag. Suppose you want to produce 6.83 grams of ethane ( C 2 H 6 ) by the following reaction. What would be left over? Calcium hydroxide dissolves in water to form its solution called lime water. CaC2 + 2H2O produces C2H2 + Ca(OH)2. Under standard conditions, it is the lightest metal and the lightest solid element. (a) (i) only (b) (ii) only (c) (iv) only Â, Electrolysis of water is a decomposition reaction. While effective for isolating gold, toxic cyanide finds its way into watersheds, causing environmental damage and... You mix 100 mL of 0.100 M calcium chloride with 100.0 mL of 0.100 M silver nitrate. MgO + H₂O → Mg(OH)₂. How many grams of sol... Balance the following equation: \\ Na_3PO_4 + Ba(NO_3)_2 \rightarrow Ba_3(PO_4)_2 + NaNO_3 \\ How many grams of barium phosphate are formed from: \\ 1. When calcium oxide reacts with water, calcium hydroxide is formed. When the reaction is finished, the chemist colle... A reaction vessel contains equal masses of iron and oxygen. Oxidation: Addition of oxygen or non-metallic element or removal of hydrogen or metallic element from a compound is known as oxidation. Is copper more reactive than iron? If the dried calcium fluoride precipitate has... Silver (I) nitrate reacts with iron (III) chloride to form silver (I) chloride and iron (III) nitrate. Microbial rancidity refers to a process in which microorganisms such as bacteria use their enzymes, including lipases, to break down chemical structures in the fat. Determine the mass lead(IV) bromide produced when 25.7 g of sodium bromide reacts with excess aqueous lead(IV) nitrate. Under what conditions do these grapes ferment? Balanced Chemical Equation and; Unbalanced Chemical Equation. In an experiment, a student allowed benzene C_6H_6^+ to react with excess Bromine Br^{2+}. What mass of CO_2 could be formed by the reaction of 15.0 g of CH_4 with 38.0 g of O_2. According to the following reaction, how many grams of barium sulfate will be formed upon the complete reaction of 26.0 grams of sulfuric acid with excess barium hydroxide? a) Calcium hydroxide (aq) + Nitric acid (aq) → Water (l) + Calcium nitrate (aq), b) Magnesium (s) + Iodine (g) → Magnesium Iodide. When 31.2 mL of 0.500 M AgNO3 is added to 25.0 mL of 0.300 M NH4Cl, how many grams of AgCl are formed? Acid rain is made when the water in the air comes into contact with sulfur trioxide. Is the decomposition of vegetable matter into compost an exothermic reaction? PHOTOLYSIS OR PHOTO DECOMPOSITION REACTION, Reactions in which a compound decomposes because of sunlight are known as PHOTOLYSIS. How many moles of A l remain unreacted? A solution of potassium chloride when mixed with silver nitrate solution, an insoluble white substance is formed. The burning of magnesium in air to form magnesium oxide is an example of chemical reaction.Â, CHEMICAL REACTIONS AND EQUATIONS –OSB NOTES. Similarly, products are written on the right-hand side (RHS) with a plus sign  (+)  between  them. Question  11:  Why  are  decomposition  reactions  called  the  opposite  of  combination reactions? Consider the synthesis reaction of Mg and O2 given below. hydrochloric acid(aq) + iron(III) oxide(s) = water(l) + iron(III) chloride(aq) a) What is... For the following reaction, 0.434 moles of iron are mixed with 0.372 moles of oxygen gas. Write an equation for the reaction of propanoyl chloride with water. Is this statement true or false? Suppose a student reacts 0.3160 grams of Mg with O2 gas. What mass of octane (C8H18) must be injected to react with the oxygen as per the... What is the importance of obtaining the percent yield of a product? Question 3: What happens when dilute hydrochloric acid is added to iron filings? Write the balanced chemical equations for the following reactions. How many bicycles can be manufactured using these parts? What is the maximum amount of NF_3 in grams that can be produced? In chemical changes, new substances are formed and it is difficult to regenerate the original substances. The fizz produced when an Alka-Seltzer tablet is dissolved in water is due to the reaction between sodium bicarbonate and citric acid. Explain. When zinc reacts with hydrochloric acid, it gives hydrogen gas and zinc chloride. 37. Why? In this reaction, oxygen is added to iron, thus, iron is oxidized. Answer : Chemical reactions that release energy in the form of heat, light, or sound are called exothermic reactions. The reaction between hydrogen and oxygen is shown below. Keeping food in air tight containers helps to slow down oxidation. When 45.0 g of Mg(OH)2 reacts with 45.0 g of HCl according to the equation below, Mg(OH)2 produces 0.772 mol of MgCl2 and HCl produces 0.616 mol of MgCl2. The light purple colour of the solution fades and finally disappears. form a layer of magnesium oxide on its surface. 11.Write the balanced chemical equation for the following equations for the following reaction and identify the type of reaction in each case. Suppose 0.48g of methane is mixed with 1.31g of oxygen. 0.050 L of 0.010 M H g ( N O 3 ) 2 react with 0.020 L of 0.10 M N a 2 S . He isolates gold, for example, and purifies it the best he can, then sells it along with his... Gaseous methane ( C H 4 ) will react with gaseous oxygen ( O 2 ) to produce gaseous carbon dioxide ( C O 2 ) and gaseous water ( H 2 O ). When 6.0 mol H 2 O react with 5.0 mol A l in the reaction below, 4.0 mol of A l are used up in the reaction. Determine the limiting reactant. Barium chloride on reacting with ammonium sulphate forms barium sulphate and ammonium chloride. If you have eight bicycle wheels and five frames, how many bikes could you build, assuming that each bike requires one frame and two wheels? Show your work. If 35.8 g Mg react with 82.3 g HCl according to the reaction below, how many grams of hydrogen gas will be produced, and how many grams of the excess reactant will be left over? (ii) lemon juice is added to a solution of potassium permanganate. Answer : Nitrogen is an inert gas and does not easily react with these substances. SIGNIFICANCE OF OXIDATION REDUCTION IN EVERYDAY LIFE: Corrosion is defined as the slow and steady destruction of a metal by the environment. What volume of 3.84 M hydrochloric acid is required to consume 4.12 grams of zinc to form aqueous zinc chloride and hydrogen gas? SiO2 + C = Si + CO (unbalanced equation). 2 N a O H + C l 2 N a C l + N a C l O + H... Aluminum chloride, AlCl_3, is used as a catalyst in various industrial react ions. Unbalanced Chemical Equation: If the number of atoms of each element in reactants is not equal to the number of atoms of each element present in product, then the chemical equation is called unbalanced chemical equation. CuSO_4 \cdot 5H_2O + 2K_2C_2O_4 \cdot H_2O \to K_2Cu(C_2O_4)_2 \cdot 2H_2O. Why does the blue colour of copper sulphate change when a piece of iron is dropped into it? In this reaction, magnesium is combined with oxygen. What is the theoretical yield for this reaction under the given conditions? reaction takes place, a chemical equation can be made more informative. State on characteristic of chemical reaction taking place when. Given the following chemical equation: Na2CO3 + H3PO4 \to Na3PO4 + H2O + CO2 Find the limiting reagent if you start with 621 ml of 2.65 M Na2CO3 and 118 grams of H3PO4. b. 822000 g \\3. How can you prevent it? Chemical changes are more permanent than physical changes. Which reactant i... You are given the balanced chemical equation: \\ C_3H_8 + 5O_2 \rightarrow 3CO_2 + 4H_2O \\ If 0.3818 moles of C_3H_8 and 1.718 moles of O_2 are allowed to react, and this is the only reaction whic... What is the mass of the solid NH_4Cl formed when 68.5 g of NH_3 is mixed with an equal mass of HCl? The number of iron is one on the LHS, while it is three on the RHS. Magnesium ribbon is burnt in an atmosphere of nitrogen gas to form solid magnesium nitride. 2H2S + SO2 arrow 3S + 2H2O. A) Write a balanced equation for the reaction. a) Zinc + Silver nitrate → Zinc nitrate + Silver. RHS. Question 1.1 Calculate the molecular mass of the following : (i) H2O (ii) CO2 (iii) CH4 Question 1.2 Calculate the mass per cent of different elements present in sodium sulphate (Na2SO4). a. Consider the reaction: Pb(NO3)2 + 2KI arrow PbI2 + 2KNO3. Answer : Water (H2O) contains two parts hydrogen and one part oxygen. 2Fe(s) + 3Cl2(g) 2FeCl3(s) a) 1.9 x 102 b) 3.8 x 102 c) 1.4 x 102 d) 2.9 x 102. What is the limiting reagent of this equation? When calcium carbonate is heated, it decomposes into calcium oxide and carbon dioxide, When ferric hydroxide is heated, it decomposes into ferric oxide and water. Calculate the mass of copper (II) oxide that will form if 1.000 g of copper metal is completely converted into copper (II) oxide. What mass of CCl4 will be formed if 1.20 moles of methane react with 1.04 moles of chlorine? He obtains 1.824 g of iron. A) H \\B) O \\C) O_2 \\D) H_2 \\E) H_2O. What happens when dil.hydrochloric acid is added to iron filings? b) What is the theoretical yield (in grams) of HgO if 231... Is it possible to obtain a percent yield that is greater than 100%? Heat energy is liberated as the reaction proceeds. B) How many grams o... Nitrogen and hydrogen react to form ammonia. cholesterol: molar mas... Propane (C3H8) reacts with oxygen in the air to produce carbon dioxide and water. If 30.0 mL of 0.150 M CaCl_2 is added to 31.0 mL of 0.100 M AgNO_3, what is the mass of the AgCl precipitate? (a) Write a balanced chemical equation of the reaction. The equation is Fe + O_2 \to Fe_3O_4 ( not balanced ). (a) Hydrogen gas is in excess. Pb(NO3)2(aq) + KCl(aq) arrow PbCl2(s) + KNO3(aq) a. For example: In equation (i), H2 is oxidized to H2O and in equation (ii), Cu is oxidised to CuO. Give an example of a chemical reaction. Balanced Chemical Equation: A balanced chemical equation has number of atoms of each element equal on both sides. 33. Once made by heating wood in the absence of air, methanol (CH3OH) is now made by reacting carbon monoxide and hydrogen at high pressure. If you started the copper cycle lab with 10.18 mL of 0.541 mol/L solution of copper nitrate what is the theoretical yield in grams of copper metal that you could obtain? CH4 + 2O2 arrow CO2 + 2H2O. How many formula units of copper(II) phosphate have been made? a. A scientist studying the reaction between decaborane and oxygen mixed 15.0 g of B10H18 with 150.0 g of O2. (b) aluminium metal is added to dilute hydrochloric acid? (b) What other name can be given to this precipitation reaction? Antimony reacts with sulfur according to the following reaction: 2Sb(s) + 3S(s) => Sb_2S_3(s) What is the mass percent yield from 2.35 g of Sb in excess S, if 1.16 g of Sb_2S_3 is obtained? A student performs the following lead extraction to test the stoichiometric method and to determine the efficiency of the reaction. A substance X, which is an oxide of a group 2 element, is used intensively in the cement industry. It results  in the  deterioration of the  metal to  form metal compounds by means  of chemical reactions with the environment.Corrosion is a simple electro chemical reaction. (s), c) Magnesium(s) + Hydrochloric acid(aq) → Magnesium chloride(aq) + Hydrogen(g), d) Zinc(s) + Calcium chloride (aq) → Zinc Chloride (aq) + Ca(s). Save my name, email, and website in this browser for the next time I comment. (b) Magnesium ribbon is burnt in an atmosphere of nitrogen gas to form solid magnesium nitride. A dilute ferrous sulphate solution was gradually added to the beaker containing acidified permanganate solution. If the percent yield of ethane is 92.4%, how many grams of ethylene ( C 2 H 4 ) would need to be reacted? Reactions that absorb energy or require energy in order to proceed are called endothermic reactions. What mass of CuO is required to make 10.0g of Cu according to the reaction. My grandmother left me some silver years ago. A manufacturer of bicycles has 50 wheels, 30 frames, and 24 seats. When sodium hydroxide (a base) reacts with hydrochloric acid, sodium chloride and water are formed. Huge quantities of sulfur dioxide are produced from zinc sulfide by means of the reaction 2 Z n S ( s ) + 3 O 2 2 Z n O ( s ) + 2 S O 2 ( g ) . This reaction can be represented byÂ. In a particular experiment, 7.9 grams of SO_3 are produced by the reaction of 5.0 grams of O_2 with 6.0 grams of S. What is the % yield of SO_3 i... How many moles of carbon dioxide are produced when 19.3 mol of propane gas is burned in excess oxygen? The following reaction is used for the preparation of oxygen gas in the laboratory, (a) It is a decomposition reaction and endothermic in nature, (c) It is a decomposition reaction and accompanied by release of heat, (d) It is a photochemical decomposition reaction and exothermic in nature, (a) Storing of oxygen gas under pressure in a gas cylinder, (c) Keeping petrol in a china dish in the open, (d) Heating copper wire in presence of air at high temperature. Magnesium oxide (Mg O), or magnesia, is a white hygroscopic solid mineral that occurs naturally as periclase and is a source of magnesium (see also oxide).It has an empirical formula of Mg O and consists of a lattice of Mg 2+ ions and O 2− ions held together by ionic bonding. A 1.020 g sample of sodium fluoride is dissolved in water, and then a precipitate of calcium fluoride is produced by adding a calcium nitrate solution.