Question

If 100cm cube of the 0.009M HNO3 is mixed with 100cm cube of 0.01M NaOH, what will the final solution be acid or basic ?

Answer 1

HNO₃ is a strong acid, while NaOH is a strong base.

They will neutralize themselves by the equation:

`HNO_3+NaOH\to NaNO_3+H_2O`

So, both solutions have the same volume, 100 cm, but the base one, NaOH, has a concentration that is greater.

This means that all the acid, HNO₃ will be neutralized by the base and some base will remain in solution.

Since some NaOH will remain not neutralized and it is a strong base, it will dissociate:

`NaOH(aq)\to Na^+(aq)+OH^-(aq)`

So, the final solution will be basic.