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an unknown amount of acid can often be determined by adding an excess of base and...

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Chemistry

an unknown amount of acid can often be determined by adding anexcess of base and then back-titrating the excess. A 0.3471 gsample of a mixture of oxalic acid, which has two ionizableprotons, and benzoic acid which has one, is treated with 91.0 mL of0.1010 M NaOH. The excess NaOH is titrated with 21.50 mL of 0.2060M HCl. Find the mass % of benzoic acid

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4.1 Ratings (616 Votes)
moles of HCl in 215ml of 02060M 0206021510000004429 moles Excess of mole of NaOH 0004429 moles moles of NaOH used 0191100000091 moles NaOH consumed 000910004429 0004671 moles let x moles of NaOH is consumed for oxalic acid    See Answer
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