Complete the charge balance equation for an aqueous solution of H2CO3 that ionizes to HCO3^- and CO3^2-

Question

______ = ______ + _______ + _______

Given choices:
[HCO3^-],[CO3^2-], [OH^-], 2[H^+], [H2CO3], 2[CO3^2-], 3[H^+], {H^+]

I don't understand how to do charge balance :(

Answer 1

I'm a little confused by the possible answers but I would write
[H^+] = [HCO3^-] + 2*[CO3^2-] + [OH^-]

Answer 2

Thank you! That was the correct answer. Plus I finally figured out why that was the correct answer :)

Answer 3

Please help me how did you find this charge balance equation. I don't know how it should balance