A 250 mL sample of rainwater is titrated using 0.0095 mol L-1
sodium hydroxide solution.
If 8.3 mL of the sodium hydroxide solution was required to reach the endpoint, what was the pH
of the rainwater?
(A) 0.54
(B) 3.50
(C) 4.50
(D) 5.40
Apparently the answer was B, but i got 3.5 in my working...