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Question

The aqueous solution of which salt NaCl or NH4Cl will have high pH?


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Solution

1. Sodium chloride salt

The salt Sodium chloride is an example of a neutral salt since its aqueous solution forms a solution of pH of 7.

It is formed by the combination of the strong acid Hydrochloric acid (HCl) and a strong base, Sodium hydroxide (NaOH).

2. Ammonium chloride

The salt Ammonium chloride is an example of acidic salt whose solution has a pH of less than seven.

The salt made from a strong acid and a weak base will have a pH of less than seven.

Ammonium chloride is a salt of a strong acid, namely Hydrochloric acid, and a weak base, namely Ammonium hydroxide.

Therefore, Ammonium chloride NH4Cl will have a pH of less than 7.

Hence, the aqueous solution of NaCl will have a higher pH.


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