Find the pH of a solution prepared by taking a 50.0 mL aliquot of a solution prepared by dissolving 12.25g of NaOH and 250.0 mL of water and diluting that aliquot to 1.00L?

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Question:

Find the pH of a solution prepared by taking a 50.0 mL aliquot of a solution prepared by dissolving 12.25g of NaOH and 250.0 mL of water and diluting that aliquot to 1.00L?

12.8

Explanation:

Considering:

For NaCl:-

Mass = 12.25 g

Molar mass = 58.44 g/mol

Volume of solution = 250.0 mL = 0.25 L

So,

Considering

Given  that:

So,

Concentration of NaOH = Concentration of [OH⁻] = 0.06125 M

pOH = – log[OH⁻] = -log(0.06125) = 1.21

pH = 14 – pOH = 14 – 1.21 = 12.8

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