You have two beakers. One contains a solution of HCl at pH = 1.0. The other contains a solution of NaOH at pH = 13. Into a third beaker, you slowly and cautiously pour 20 mL of the HCL and 20 mL of the NaOH. After complete stirring, the pH of the mixture will be

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When equal amounts of a strong acid and a strong base are mixed, they neutralize each other completely and form water and a salt. In this case, the HCl and NaOH will react to form water and NaCl salt. Since NaCl is a neutral salt and does not affect the pH of the solution, the final pH of the mixture will be 7.0, which is the pH of pure water.

You Have Two Beakers