Limiting Reagent Worksheet #2



Limiting Reagent and Percent Yield

CuCl2 + 2 NaNO3 ( Cu(NO3)2 + 2 NaCl

1) If 15.6 grams of copper (II) chloride, CuCl2 react with 20.2 grams of sodium nitrate, NaNO3, how many grams of sodium chloride, NaCl, can be formed? What are the limiting and excess reactants? How many grams of the excess reactant remain when the reaction stops? If 12.6 grams of sodium chloride are actually produced, what is the percent yield of sodium chloride?

Amount of NaCl produced _____________________

Limiting reactant _______________ Excess reactant _______________

Excess leftover ________________ Percent Yield _________________

2) If 10.4 grams of hydrogen, H2, and 9.14 grams of oxygen, O2, are placed together in a container and allowed to react according to the equation how many grams of water, H2O, would be produced by the reaction? What are the limiting and excess reactants? How many grams of the excess reactant remain when the reaction stops? How many grams of the excess reactant were used up during the experiment? What is the percent yield of water if the actual yield is 8.75 grams of water?

2 H2 + O2 ( 2 H2O

Amount of H2O produced ___________________ Limiting reactant _______________

Excess reactant _______________ Excess leftover ________________

Excess used up during reaction____________ Percent Yield _________________

3) Methyl alcohol (wood alcohol), CH3OH, is produced via the reaction

CO(g) + 2 H2(g) ( CH3OH(l)

When a mixture of 1.20 g H2(g) and 7.45 g CO(g) are allowed to react, how many grams of methanol could be produced? ? What are the limiting and excess reactants? How many grams of the excess reactant remain when the reaction stops? How many more grams of the limiting reactant would be needed to reactant with all of the excess reactant? If the percent yield is 88.4%, what is the actual yield of CH3OH?

Amount of H2O produced ___________________ Limiting reactant _______________

Excess reactant _______________ Excess leftover ________________

Extra limiting reactant that is needed _____________ Actual Yield _________________

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