What is [H3O+] for a 0.500 M solution of hydrochloric acid? Make sure you include the ionization equation.

1 Answer
Mar 23, 2017

Answer:

#[H_3O^+]=0.500*mol*L^-1#

Explanation:

Strong acids (and hydrochloric acid is a strong acid), are almost completely ionized in water:

#HCl(aq) + H_2O(l) rarr H_3O^+ + Cl^-#

And thus a #0.500*mol*L^-1# solution of #HCl(aq)# is STOICHIOMETRIC in #H_3O^+# and #Cl^-#, i.e. #[H_3O^+]=[Cl^-]=0.500*mol*L^-1#.