Question

NaNO 2 ​ → Na^{+1}Na +1 ++ NO_2^{-1}NO 2 −1 ​ The pH active species is (acidic or basic). NH_4Br \LARGE\rightarrowNH 4 ​ Br→ NH_4^{+1}NH 4 +1 ​ ++ Br^{-1}Br −1 The pH active species is (acidic or basic). NaClO_2 \LARGE\rightarrowNaClO 2 ​ → Na^{+1}Na +1 ++ ClO_2^{-1}ClO 2 −1 ​ The pH active species is (acidic or basic).

Answer 1

NaNO 2 → Na + 1 Na +1 ++ NO_2-1 NO 2 -1 The pH active species is (acidic or basic).
In this case, nitrite NO2 can only act as a base with water, since it hydrolyzes and produces a weak acid. therefore, the pH must be slightly acidic.

NH_4Br \ LARGE \ rightarrowNH 4 Br → NH_4 ^ {+ 1} NH 4 +1 ++ Br <-1> Br -1 The pH active species is (acidic or basic). NaClO_2
Ammonium bromide NH4 is a salt that acts as an acid with water, since it hydrolyzes and forms a base, so the pH must be slightly basic.

\ LARGE \ rightarrowNaClO 2 → Na + 1 Na +1 ++ ClO_2 ^ -1 ClO 2 -1 The pH active species is (acidic or basic).
This perchlorate base is a powerful oxidant. Perchlorate acts as a base, with water it hydrolyzes and forms a slightly acidic pH.