Wednsday Exam Practice Questions

Front

What is percent yield?

Back

Percent yield is a measure of the efficiency of a chemical reaction, calculated as the ratio of the actual yield to the theoretical yield, expressed as a percentage.

Front

How do you calculate percent yield?

Back

Front

What is theoretical yield?

Back

Theoretical yield is the maximum amount of product that could be formed from a given amount of reactants in a chemical reaction, assuming complete conversion.

Front

What is actual yield?

Back

Actual yield is the amount of product that is actually obtained from a chemical reaction, which is often less than the theoretical yield due to various factors.

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 identify the limiting reactant?

Back

To identify the limiting reactant, compare the mole ratios of the reactants used in the reaction to the mole ratios required by the balanced equation.

Front

What is the formula for calculating the limiting reactant?

Back

There is no specific formula; instead, you must calculate the moles of each reactant and compare them based on the stoichiometry of the balanced equation.

Front

What is the mole ratio?

Back

The mole ratio is the ratio of the amounts of moles of reactants and products in a balanced chemical equation.

Front

What is the significance of percent yield in chemistry?

Back

Percent yield indicates the efficiency of a reaction and helps chemists understand how well a reaction proceeds under given conditions.

Front

What factors can affect the actual yield of a reaction?

Back

Factors include incomplete reactions, side reactions, loss of product during recovery, and measurement errors.