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DIRECT METHOD EXAMPLE: A buffer was created by mixing 10 mL of a 0.10 M hydrofluoric...

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Chemistry

DIRECT METHOD EXAMPLE: A buffer was created by mixing 10 mL of a0.10 M hydrofluoric acid solution with 25 mL of a 0.20 M sodiumfluoride solution. What is this solution’s pH? Do you expect it tobe a ‘good’ buffer with a high buffer capacity or a ‘poor’ bufferwith low capacity? The Ka of hydrofluoric acid is: 7.2 x 10-4. Showwork, thank you.

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4.3 Ratings (619 Votes)
first calculate moles of both reactants moles of NaF 0025 020 0005 moles moles of HF 0010 01 0001 moles pH pKa logAHA pKa log72x104 314 pH 314 log00050001 pH 384 The goal of a buffer is to keep the pH of a solution within a narrow range While the ratio of AHA influences the pH of a solution the actual concentrations of A and HA influence the    See Answer
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