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November 28, 2014

Homework Help: Chemistry(Please help)

Posted by Hannah on Monday, April 9, 2012 at 4:24pm.

For an acetic acid-sodium acetate buffer to have a pH of 4.64, what molar ratio
of CH3COOH to Na+ CH3COO– is needed?

I know that the Ka value for acetic acid is 1.8e-5 and that I have to divide this value by the value of sodium acetate but I do not understand how you get the value for sodium acetate.

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