Question

What colour change would `NaCl(aq)` cause to added litmus paper?

Answer 1

Nada.........

Explanation:

Litmus paper may change colour depending on the pH of the solution in which it is placed. We has `NaCl(aq)`, which as the salt of a strong acid and strong base does not affect aqueous `pH`,

On the other hand, if we examined the `pH` of say `NaF(aq)`, we would find that the solution was SLIGHTLY basic due to the hydrolytic action of the fluoride ion:

`F^(-)+H_2O(l)rightleftharpoonsHF(aq) + HO^-`