Question

Question #a903c

Answer 1

`NaOH + HNO_3 -> H_2O + NaNO_3`

Explanation:

This is a double displacement reaction.

This means the cations will be switched around (or the anions if you prefer).

This means the Na+ ion is switched with the H+ ion.

The final answer will then be `NaOH + HNO_3 -> H_2O + NaNO_3`

Answer 2

`"NaNO"_3 + "H"_2"O"`

Explanation:

This is an example of a neutralization reaction, which is a subset of double displacement reactions.

A neutralization reaction is when an acid and a base react to form water and salt.

Taking the example problem,

`color(white)(----)NaOH + HNO_3 -> NaNO_3 + H_2O`

`"NaOH"` (a strong base) and `"HNO"_3` (a strong acid) react in a 1:1 mole ratio, where 1 mole of of `"NaOH"` will produce 1 mole of `[OH^-]` in solution and 1 mole of `"HNO"_3` will produce 1 mole of `[H^+]` in solution.

The solution should produce a `"pH"` of `7` since equal amounts of the acid and base react and neither the acid or the base is in excess, therefore

`color(white)(aaaaaaaaaaaaaaaa)[OH^-] = [H_3stackrel"+"O]`