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I've taken 298 mLs of acetic acid with a concentration of 0.294 mol/L and mixed it with 102 mLs of sodium acetate with a concetration

I've taken 298 mLs of acetic acid with a concentration of 0.294 mol/L and mixed it with 102 mLs of sodium acetate with a concetration of 0.495 mol/L. To this solution, I add 300 mL of 1.274 mol/L sodium hydroxide. What is the final pH of the solution?

The pKa of acetic acid is 4.76. Answer to 2 decimal places.

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