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April 17, 2014

Homework Help: Chemistry

Posted by jhon on Thursday, February 16, 2012 at 12:49am.

If a 2.6 g of weak diprotic acid were dissolved in 100 mL of water and a 10 mL aliquot of this solution required 21.6 mL of 0.1 M NaOH to reach the first endpoint, what are the equivalent and formula weights of H2A?

I think I first need to find the moles of NaOH. Then, by using the formula.

H2A + 2NaOH ----> Na2A + 2 H20

I am stuck from here. Do I find the equivalence point of each and add them?

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