is hcn strong or weak
Â· just now. Report Abuse. KOH-strong base HCl-strong acid CH3COOH-weak acid H2SO4 - strong acid H2CO3 - weak acid H3PO4 - weak acid H2O-neutral H3O+ - strong acid HCN-weak acid NH4OH-weak base. Lkk814 Â· 9 years ago.