A buffer solution is prepared by mixing 200 mL of 0.2 M salt solution and 400 mL of a 0.2 M acid solution. What is the concentration of the resulting buffer?

Question

~what is the pKa?

Answer 1

What salt? what acid? what's the pH.

Answer 2

32

Answer 3

I have not been able to get answer

Answer 4

Please help me with the answer

Answer 5

Please help me