Percentage Yield

Question 1

Why might it not be possible to obtain the calculated amount of a product?

Answer 1

Reaction​ ​may​ ​not​ ​go​ ​to​ ​completion​ ​because​ ​it​ ​is​ ​reversible
Some​ ​of​ ​the​ ​product​ ​may​ ​be​ ​lost​ ​when​ ​it​ ​is​ ​separated​ ​from​ ​the​ ​reaction
mixture
Some​ ​of​ ​the​ ​reactants​ ​may​ ​react​ ​in​ ​ways​ ​different​ ​to​ ​the​ ​expected
reaction