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 ionizable protons, and benzoic acid, which has one, is treated with 97.0 ml of 0.1090 m naoh. the excess naoh is titrated with 21.00 ml of 0.2060 m hcl. find the mass % of benzoic acid.
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Assume that 13.5 g solid aluminum (al) react with hcl to produce solid aluminum chloride (alcl3) salt and gaseous hydrogen (h2) at standard temperature and pressure.
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An unknown amount of acid can often be determined by adding an excess of base and then back-titratin...
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