Calculate the final pH of the resultant solution if: 5.0g of sodium hydroxide were completely dissolved in 120mL of distilled water and this solution was added to 200mL of 0.2mol.L^-1 nitric acid.
I've been trying to learn how to do this for ages but cannot, i cant find a video that seems relevant to the topic at all and has no examples similair to this question nor can i figure it out myself.