Chemistry titration problem help?

Posted on 2015-09-21 05:55:00 in Chemistry by CHANG

The question is:

25 mL of aqueous NaOh with an unknown concentration is titrated with a solution of 0.50 M HCl. It requires 10.25 mL of 0.50 M HCl to reach the end point. What is the concentration of NaOH? (Hint: Start by writing the balanced chemical equation)

I seem to be setting up the problem right but when I work it out, none of my answers are choices.

The choices are-
A. 0.13 M
B. 0.21 M
C. 1.2 M
D. 1.7 M
E. 2.1 M

Help on showing me how to set this up would be greatly appreciated

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