## Chemistry (4th Edition)

(a) For a pure acid solution, $[A^-] = [H_3O^+]$*, so this statement is false. (b) -log(1.0) = 0 : True. (c) In a strong acid solution: $[HA]_{initial} = [H_3O^+]$, so this is true. (d) After putting a strong acid in water, it completely dissociates, so there is no $[HA]$.