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pH Titration Curve Equivalence Point

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What's the pH at the first equivalence point of 0.100M of malonic acid of 25mL with 0.140M of NaOH? What's the pH after 25mL of NaOH were added?

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The solution displays all working in going through the steps to find the pH at the first equivalence point of the described solutions.

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Because, at equivalence point the malonic acid is completely neutralized, with no excess of NaOH.
Therefore, pH = 7.00 (neutral solution) --Answer

When we add 25 mL of 0.14M NaOH,
number of ...

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