Chemistry
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Acid Base Titration
An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.
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**Question:** Which of the following combinations of buffering systems and molar ratios of compounds would work best for a laboratory experiment requiring a pH of 2.4? (pKa (H₃PO₄) = 2.12 and pKa (HF) = 3.15). **Options:** (a) 0.57 mol H₃PO₄ / 0.30 mol H₂PO₄⁻ (b) 0.60 mol HF / 0.11 mol F⁻ (c) 0.11 mol HF / 0.60 mol F⁻ (d) 0.30 mol H₃PO₄ / 0.57 mol H₂PO₄⁻ (e) none of the above
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Transcribed Image Text:**Question:** Which of the following combinations of buffering systems and molar ratios of compounds would work best for a laboratory experiment requiring a pH of 2.4? (pKa (H₃PO₄) = 2.12 and pKa (HF) = 3.15). **Options:** (a) 0.57 mol H₃PO₄ / 0.30 mol H₂PO₄⁻ (b) 0.60 mol HF / 0.11 mol F⁻ (c) 0.11 mol HF / 0.60 mol F⁻ (d) 0.30 mol H₃PO₄ / 0.57 mol H₂PO₄⁻ (e) none of the above
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Step 1: Define buffer
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