What do these reactions end up looking like when they react with water?
a) CN-(aq)
b) HNO3(aq)
c) H2SO3(aq)
CN^- is a base and hydrolyzes.
HNO3 is a strong acid and ionizes 100%.
H2SO3 is a diprotic weak acid (both H^+) are weak, both react with water to form H^+, HSO3^-, and SO3^-2.