I have a few exercices in which I have to find the pH in some situations, but I cannot seem to find a way to do so, so if you guys could help it would be great. They are the following:
1 --> the pH of a solution that is the result of adding 50mL of a solution 0,100M HCl to 50mL of a solution containg 0,150M CH3CO2H and 0,20M CH3CO2Na.
2 --> the pH of a solution that contains 0,20 moles of CH3CO2Na in a litre of solution.
3 --> the pH of a solution 0,10M of Na2HPO4, justifying the approximations that have to be done.