A 0.1 M aqueous solution of ________ will have a pH of 7.0 at 25 oC . Na2SO3 NaBr NaClO4 NH4I

Question

A. NaBr and NaClO₄ 

B. NaClO₄ only

C. Na₂SO₃ only

D. NH₄I only

E. Na₂SO₃ and NaBr

Answer 1

A. NaBr and NaClO₄ because both of these salts are formed from the combination of a strong acid and a strong base. This results in a salt with a neutral pH.

Na₂SO₃ is from a strong base and a weak acid. pH will be basic

NH₄I is from a weak base and a strong acid. pH will be acidic