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anonymous
 5 years ago
Acetic acid has a Ka value of 1.8 x 10^5. How many grams of NaC2H3O2 would have to be added to 100ml of .10M HC2H3O2 to prepare a buffer with a pH of 4.5?
anonymous
 5 years ago
Acetic acid has a Ka value of 1.8 x 10^5. How many grams of NaC2H3O2 would have to be added to 100ml of .10M HC2H3O2 to prepare a buffer with a pH of 4.5?

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JFraser
 5 years ago
Best ResponseYou've already chosen the best response.0the pH of a buffer is usually calculated with HendersonHasselbach:\[pH = pKa + \log([B]/[A])\] where [B] and [A] are the concentrations of the conjugate base and acid. For this problem, you need to solve for [B], then turn that concentration into moles of NaC2H3O2 using the volume of solution, then into grams using molar mass.
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