When can an x be ignored in solving an equilibrium expression derived from a RICE table?

Question

Quizplus · Accepted Answer

The x can be ignored when it is very much smaller than the term it is added to or subtracted from, as it will not significantly affect the final result. This is known as the "approximation" or "simplification" method. However, this approach should only be used when the value of x is less than 5% of either the initial concentration or the equilibrium concentration.

When Can an X Be Ignored in Solving an Equilibrium