Question

Which of the following reasons (specific to this lab) would have caused the percent yield of calcium carbonate to be less than 100%? Highlight all that apply (there may be more than one)

Some of the sodium carbonate never fully dissolved in the water and did not transfer when mixed with calcium acetate

The glassware used to mix the reactant solutions were not properly dried before use

Some of the calcium carbonate remained stuck to the side of the glassware after filtering

The product, calcium carbonate, was not fully dried out before weighing

Some of the calcium carbonate spilled when measuring its mass

Answer 1

Some of the calcium carbonate remained stuck to the side of the glassware after filtering

Some of the calcium carbonate spilled when measuring its mass

Step-by-step explanation:

The percent yield is obtained from;

Actual yield/Theoretical yield * 100

Usually, the actual yield is less than the theoretical yield thereby making the percent yield less than 100%.

In the case of this particular reaction; when some calcium carbonate remains stuck on the glassware or some calcium carbonate is spilled during weighing, the actual yield of product obtained from the reaction becomes less than the theoretical or calculated yield hence the percent yield becomes less than 100%.