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A 0.5123g sample (molar mass 204.23g/mol) of KHP was dissolved in about 25 mL of distilled water and titrated to the phenolphthalein end point with 28.75 mL of a sodium hydroxide solution. Calculate the molar concentration of the hydroxide solution.

Question

A 0.5123g sample (molar mass 204.23g/mol) of KHP was dissolved in about 25 mL of distilled water and titrated to the phenolphthalein end point with 28.75 mL of a sodium hydroxide solution. Calculate the molar concentration of the hydroxide solution.

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Step 1

Potassium hydrogen phthalate, KHP reacts with sodium hydroxide, NaOH as below.

As per the stoichiometric equation,

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Step 2

0.5123 g of KHP was used for the experiment.

Molar mass of KHP = 204.23 g/mol.

Mole(s) KHP =

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Step 3

As per the stoichiometric equation above,

Volume of NaOH solution re...

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