Hydrochloric acid, HCl, is a strong acid that dissociates completely in water to form H3O+ and Cl-. Should the
value of K for the reaction HCl(aq) + H2O(l) −→←− H3O+(aq) + Cl-(aq) be 1 × 10-2, 1 × 10-5, or “very large”? Justify your answer.

Question

Hydrochloric acid, HCl, is a strong acid that dissociates completely in water to form H3O+ and Cl-. Should the 
value of K for the reaction HCl(aq) + H2O(l) ﻿﻿−→←− H3O+(aq) + Cl-(aq) be 1 × 10-2, 1 × 10-5, or “very large”? Justify your answer.

matt101 · Answer

Check out my answer here: http://openstudy.com/study#/updates/5501ae60e4b03385bcf953ee You have the reaction provided in the question. If HCl dissociates completely (i.e. LOTS of products and VERY LITTLE reactants), what would you expect K to be?