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July 30, 2015

Homework Help: chemistry

Posted by Finding the pH of a weak acid? on Tuesday, March 20, 2012 at 12:43am.

A vitamin C tablet containing 250 mg of ascorbic acid (C6H7O6; Ka = 8.0 x 10-5 is dissolved in a 250 mL glass of water. What is the pH of the solution?

i tried answering this question multiple times but i still get it wrong.... can someone help? step-by-step please.

what i did was....
make a chemical equation
C6H8O6 + H20 <--> C6H7O6- + H30+

but i fell like my equation is off....

but i did an ICE table and used it to find x then the pH

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