Question

what volume of 0.120 M NaOH must be added to 100 ml of 0.100 M NaHC2O4 to reach ph of 4.70?

The answer is 60 ml but I don't know how to find it.
Can you please show me the steps and how to do it please

Answer 1

Do you have k1 and k2 for H2C2O4? We can't get the same answer unless we use the same values for the two constants.

Answer 2

H2C2O4 Ka1 = 5.9 x 10-2

HC2O4- Ka2 = 5.1 x 10-5

Answer 3

I posted the answer above. Let me know if you can't find it.

Answer 4

Clown Bot just incase he got a hole in one