Question

A buffer is created by combining 160.0 mL of 0.25 M HCHO2 with 70.0 mL of 0.20 M NaOH.

Answer 1

Determine the pH of the buffer.

Answer 2

Do you know hendersons equation?

Answer 3

yes

Answer 4

ok then i suppose the problem is that you do not have Ka value of formic acid?

Answer 5

i can find the value

Answer 6

then where exactly lies the problem
pH=pKa+log salt/acid.
Here meq of salt=meq of base
meq of acid left =meq of acid originally-meq of base.

Answer 7

do i need to find its no of mol?

Answer 8

yeah....