Limiting Reactant and Percent Yield – Flashcards
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The chemical equation shows iron(III) phosphate reacting with sodium sulfate. 2FePO4 + 3Na2SO4 -->Fe2(SO4)3 + 2Na3PO4 What is the theoretical yield of Fe2(SO4)3 if 20.00 g of FePO4 reacts with an excess of Na2SO4?
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26.52 g
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Salicylic acid (C7H6O3) reacts with acetic anhydride (c4h6o3-structure/">c4h6o3) to form acetylsalicylic acid (C9H8O4). 2C7H6O3(aq) + C4H6O3(aq)--> 2C9H8O4(aq) + H2O(l) What is the limiting reactant if 70.0 g of C7H6O3 and 80.0 g of C4H6O3 react?
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salicylic acid
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Consider the balanced equation. N2 + 3H2 -->2NH3 What is the percent yield of NH3 if the reaction of 26.3 g of H2 produces 79.0 g of NH3?
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53.4%
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Consider the combustion reaction for acetylene. 2C2H2(l) + 5O2(g) --> 4CO2(g) + 2H2O(g) If the acetylene tank contains 37.0 mol of C2H2 and the oxygen tank contains 81.0 mol of O2, what is the limiting reactant for this reaction?
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O2
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The formula is used to calculate the percent yield of a reaction.
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(actual yield/theoretical yield)x100%
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What is used up first and stops a chemical reaction?
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limiting reactant
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Consider the balanced equation. 2HCl + Mg -->MgCl2 + H2 If 40.0 g of HCl react with an excess of magnesium metal, what is the theoretical yield of hydrogen?
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1.11 g
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The electrolysis of water forms H2 and O2. 2H2O --> 2H2 + O2 What is the percent yield of O2 if 10.2 g of O2 is produced from the decomposition of 17.0 g of H2O?
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67.6%
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A 13.00 g sample of citric acid reacts with an excess of baking soda as shown in the equation. What is the theoretical yield of carbon dioxide?
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8.93 g
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Ammonia is produced by the following reaction. 3H2(g) + N2(g) -->2NH3(g) When 7.00 g of hydrogen react with 70.0 g of nitrogen, hydrogen is considered the limiting reactant because_____
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7.5 mol of hydrogen would be needed to consume the available nitrogen.
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Consider the chemical equation. CuCl2 + 2NaNO3 -->Cu(NO3)2 + 2NaCl What is the percent yield of NaCl if 31.0 g of CuCl2 reacts with excess NaNO3 to produce 21.2 g of NaCl?
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78.7%
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Consider the balanced equation. CuSO4 + Zn -->ZnSO4 + Cu If 200.0 g of copper(II) sulfate react with an excess of zinc metal, what is the theoretical yield of copper?
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1.253 g
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The chemical equation shows how ammonia reacts with sulfuric acid to produce ammonium sulfate. 2NH3(aq) + H2SO4(aq) --> (NH4)2SO4(aq) How many grams of ammonium sulfate can be produced if 60.0 mol of sulfuric acid react with an excess of ammonia?
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3,970 g
