Question

An aqueous solution of ____ will produce a basic solution.

Answer 1

Hydrolysis of $NH_{4}ClO_{4}$ is given as:

$NH_{4}ClO_{4}+H_{2}O\rightleftharpoons NH_{4}OH + HClO_{4}$

Here, $NH_{4}OH$ is a   weak base and $HClO_{4}$ is a strong acid. Thus, solution is more acidic

Hydrolysis of $KBr$ is given as:

$KBr+H_{2}O\rightleftharpoons KOH + HBr$

Here, $KOH$ is a strong base and $HBr$ is a strong acid.Thus, solution is neutral.

Hydrolysis of $NaCl$ is given as:

$NaCl+H_{2}O\rightleftharpoons NaOH + HCl$

Here, $NaOH$ is a strong base and $HCl$ is a strong acid.Thus, solution is neutral.

$Na_{2}CO_{3}+2H_{2}O\rightleftharpoons 2NaOH + H_{2}CO_{3}$

Here, $NaOH$ is a strong base and $H_{2}CO_{3}$ is a weak acid.Thus, solution is basic.      

$NaHCO_{3}+H_{2}O\rightleftharpoons NaOH + H_{2}CO_{3}$

Here, $NaOH$ is a strong base and $H_{2}CO_{3}$ is a weak acid.Thus, solution is basic.        

Hence, an aqueous solution of  $NaHCO_{3}$ and $Na_{2}CO_{3}$ will produce a basic solution.

Answer 2

NaClO, K2CO3, and NaF will form basic soltions.