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Calculate the pH of a buffer that is 0.205M in NaHCO3 and 0.285M in Na2CO3.

Sagot :

Plug in the values into this equation

Ka = [H+][CO3 2-]/[HCO3-]

[ ] = concentration

then solve for [H+] if you know the Ka of HCO3-, and then take the -log[H+] to find the pH.

The Ka of HCO3- = 5.6x10^-11
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