4.75 An unknown amount of acid can often be determined by adding an excess of base and then "back-titrating" the excess. A 0.3471-g sample of a mixture of oxalic acid, which has two ioniz- able protons, and benzoic acid, which has one, is treated with T00.0 mL of 0.1000 M NaOH. The excess NaOH is titrated with 20.00 mL of 0.2000 M HCI. Find the mass % of benzoic acid. ruse in for

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4.75 An unknown amount of acid can often be determined by
adding an excess of base and then "back-titrating" the excess. A
0.3471-g sample of a mixture of oxalic acid, which has two ioniz-
able protons, and benzoic acid, which has one, is treated with
T00.0 mL of 0.1000 M NaOH. The excess NaOH is titrated with
20.00 mL of 0.2000 M HCI. Find the mass % of benzoic acid.
ruse in
for
Transcribed Image Text:4.75 An unknown amount of acid can often be determined by adding an excess of base and then "back-titrating" the excess. A 0.3471-g sample of a mixture of oxalic acid, which has two ioniz- able protons, and benzoic acid, which has one, is treated with T00.0 mL of 0.1000 M NaOH. The excess NaOH is titrated with 20.00 mL of 0.2000 M HCI. Find the mass % of benzoic acid. ruse in for
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