Percentage Yields

Frequently part of the organic practical question

Actual Yield Amount of product you get in the reaction Sometimes this is given as a density and a volume Mass = density * volume 23 ml of ethanol [density 0.8g/cm3] 23 * 0.8 = 18.4 g

% Yield = Actual Yield * 100 Theoretical Yield

Theoretical Yield is the amount you would get if all of the limiting reactant became products. This is calculated using the balanced equation

This rarely happens; in many reactions yields are low, especially in organic reactions