A buffer is made by mixing 0.900 mol Na[CH3CO2] and 0.500 mol HCl in enough water to make 2.50 L of — Acids and Bases Chemistry Question

A buffer is made by mixing 0.900 mol Na[CH₃CO₂] and 0.500 mol HCl in enough water to make 2.50 L of solution. What is the pH of this solution? The pKa of CH₃COOH is 4.75.