C14 Theoretical Yield

Question 1

Theoretical yield

Answer 1

The maximum possible mass of a product that can be made in a chemical reaction.

Question 2

How can it be calculated from?

Answer 2

the balanced equation,
the mass and relative formula mass of the limiting reactant, and
the relative formula mass of the product

Question 3

Actual yield

Answer 3

An actual yield is the mass of a product actually obtained from the reaction.

Question 4

Why is theoretical yield usually less than the theoretical yield?

Answer 4

. Incomplete reactions, in which some of the reactants do not react to form the product.
. Practical losses during the experiment, such as during pouring or filtering.
. Side reactions (unwanted reactions that compete with the desired reaction).

Question 5

Calculating percentage yield

Answer 5

Percentage yield = actual yield / theoretical yield x 100

The percentage yield can vary from 100% (no product has been lost) to 0% (no product has been made).

Question 6

Copper oxide reacts with sulfuric acid to make copper sulfate and water. In an experiment, 1.6 g of dry copper sulfate crystals are made. If the theoretical yield is 2.0 g, calculate the percentage yield of copper sulfate.

Answer 6

Actual yield = 1.6 g
Percentage yield = 1.6 / 2.0 × 100
Percentage yield = 80%