A deep-red solution at equilibrium for Fe ^ 3+ _ (aq) + SCN ^ - _ (aq) FeSCN ^ 2+ _…
CHEMISTRY · Subjective · A Level · Chemistry · Chemical equilibria (Le Chatelier’s principle and Kc) · Chemical equilibria (Le Chatelier’s principle and Kc)
Problem
A deep-red solution at equilibrium for
Fe(aq)3++SCN(aq)−⇌FeSCN(aq)2+
becomes noticeably paler when several millilitres of distilled water are added, then slowly regains some colour but remains lighter than the original solution after a new equilibrium is reached. In one to two sentences, explain the direction of the equilibrium shift produced by the addition of water.