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Author Question: What is the buffer range (for an effective 2.0 pH unit) for a benzoic acid/sodium benzoate buffer? ... (Read 253 times)

cnetterville

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on: Jul 8, 2021

Question 1

What is the approximate pH at the equivalence point of a weak acid-strong base titration if 25 mL of aqueous hydrofluoric acid requires 30.00 mL of 0.400 mol L-1 NaOH(aq)? Ka = 6.76 × 10-4 for HF.
◦ 1.74
◦ 5.75
◦ 8.25
◦ 12.26

Question 2

What is the buffer range (for an effective 2.0 pH unit) for a benzoic acid/sodium benzoate buffer? [Ka for benzoic acid is 6.3 × 10-5]
◦ 8.8 - 10.8
◦ 7.4 - 9.4
◦ 5.3 - 7.3
◦ 4.7 - 6.7
◦ 3.2 - 5.2
General Chemistry: Principles and Modern Applications ¦ Petrucci, Herring, Madura, Bissonnette ¦ 11th Edition
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Marked as best answer by cnetterville on Jul 8, 2021

sierramartinez

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Reply #1 on: Jul 8, 2021
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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cnetterville

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Reply 2 on: Jul 8, 2021
Excellent

peter

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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