Question

CrO42– + 2H+ ⇄ Cr2O72– + H2O

A student adds sodium hydroxide (NaOH) to the solution at equilibrium. In one to two sentences, describe and explain any changes to the solution that the student will observe.

Answer 1

[AI-generated answer — Bot GPT 3.5]

The student will observe that the solution becomes more basic as the addition of sodium hydroxide increases the concentration of hydroxide ions. This will shift the equilibrium towards the reactants (left side) to try and counteract the increase in hydroxide ions, resulting in a decrease in the concentration of chromate ions (CrO42-).