Limiting Reactant/ReactionTypes/Percent Yield

Front

What is a limiting reactant?

Back

The limiting reactant is the substance that is completely consumed in a chemical reaction, limiting the amount of product that can be formed.

Front

How do you calculate percent yield?

Back

Percent yield = (Actual yield / Theoretical yield) x 100%.

Front

What is the theoretical yield?

Back

The theoretical yield is the maximum amount of product that can be produced from a given amount of reactants, based on stoichiometric calculations.

Front

What is the mole ratio in a chemical reaction?

Back

The mole ratio is the ratio of moles of one substance to the moles of another substance in a balanced chemical equation.

Front

How do you determine the limiting reactant in a reaction?

Back

To determine the limiting reactant, calculate the moles of each reactant and compare the mole ratios required by the balanced equation.

Front

What is the balanced equation for the reaction of sodium and chlorine?

Back

2Na + Cl2 → 2NaCl.

Front

If 7.62g of Fe reacts with 8.67g of S, how do you find the limiting reactant?

Back

Convert grams to moles for both Fe and S, then use the balanced equation to find which reactant is in lesser amount based on stoichiometry.

Front

What is the mole ratio of H2 to H2O in the reaction 2H2 + O2 → 2H2O?

Back

The mole ratio of H2 to H2O is 2:2 or 1:1.

Front

What does it mean if the percent yield is over 100%?

Back

A percent yield over 100% indicates that the actual yield exceeds the theoretical yield, often due to measurement errors or impurities.

Front

What is the balanced equation for the reaction of calcium carbide with water?

Back

CaC2 + 2H2O → C2H2 + Ca(OH)2.