worksheet 14cgt - Worksheet #14 Limiting Reagents 1....

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Worksheet 14 1 Worksheet #14 Limiting Reagents 1. Potassium superoxide, KO 2 , is used in rebreathing masks to generate oxygen according to the reaction below. If the mask contains 0.150 mol KO 2 and 0.100 mol water, how many moles of oxygen can be produced? What is the limiting reagent? 4KO 2 (s) + 2H 2 O( ) 4KOH(s) + 3O 2 (g) 2. Suppose 13.7 g of C 2 H 2 reacts with 18.5 g O 2 according to the reaction below. What is the mass of CO 2 produced? What is the limiting reagent? 2C 2 H 2 (g) + 5O 2 (g) 4CO 2 (g) + 2H 2 O( ) 3. Nitrogen gas can react with hydrogen gas to form gaseous ammonia. If 4.7 g of nitrogen reacts with 9.8 g of hydrogen, how much ammonia is formed? What is the limiting reagent? 4. One of the most common acids found in acid rain is sulfuric acid. Sulfuric acid is formed when gaseous sulfur dioxide reacts with ozone (O 3 ) in the atmosphere to form gaseous sulfur trioxide and oxygen. The sulfur trioxide forms sulfuric acid when it comes in contact with water. If 5.13 g of sulfur dioxide reacts with 6.18 g of ozone, how much sulfur trioxide is formed? What is the limiting reagent? 5. Another way that sulfuric acid is formed in the atmosphere is when sulfur dioxide reacts with oxygen in a reaction catalyzed by dust in the atmosphere to form sulfur trioxide. If 7.99 g of sulfur dioxide reacts with 2.18 g of oxygen, how much sulfur trioxide can form? What is the limiting reagent? Determining Excess Reactants 6. In the reaction in problem #5 above, how much of the excess reactant remains after all of the limiting reactant has reacted? 7. Heating together the solids NH 4 Cl and Ca(OH) 2 can generate ammonia. Aqueous CaCl 2 and liquid H 2 O are also formed. If a mixture of 33.0 g each of NH 4 Cl and Ca(OH) 2 is heated, how many grams of NH 3 will form? What is the limiting reagent? Which reactant remains in excess, and in what mass? 8. Nitrogen monoxide is formed primarily in car engines, and it can react with oxygen to form gaseous nitrogen dioxide. Nitrogen dioxide forms nitric acid when it comes in contact with water, another component of acid rain. If 3.13 g of nitrogen monoxide reacts with 4.16 g of oxygen, how much nitrogen dioxide will form? What is the limiting reagent? Which reactant remains in excess, and in what mass? Percent Yield 9. Liquid nitroglycerine (C 3 H 5 (NO 3 ) 3 ) is a powerful explosive. When it detonates, it produces a gaseous mixture of nitrogen, water, carbon dioxide, and oxygen. What is the theoretical yield of nitrogen 5.55 g of nitroglycerine explodes? If the actual amount of nitrogen obtained is 0.991 g, what is the percent yield of nitrogen?
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Worksheet 14 2 10. Solid copper(I) oxide reacts with oxygen to form copper(II) oxide. If 4.18 g of copper(I) oxide reacts with 5.77 g of oxygen, what is the theoretical yield of copper(II) oxide? If the actual amount of copper(II) oxide obtained is 4.28 g, what is the percent yield?
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worksheet 14cgt - Worksheet #14 Limiting Reagents 1....

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