Which of the following combinations will make a buffer

Last updated: 7/2/2023

Which of the following combinations will make a buffer solutions i CH COONa 2 mol HCl 1 mol iii CH COOH 1 mol CH COONa 1 mol 1 i 2 H ii CH COOH 2 mol NaOH 1 mol 3 0 0 4 i ii