A miracle lotion which is sold under the label of fixitall

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Reference no: EM13641315

A "miracle" lotion, which is sold under the label of FixitAll, is a mixture containing both zinc oxide (ZnO) and iron oxide (form unspecified). A 1.4882 gram sample of the dried lotion was dissolved in HCl and diluted to a volume of exactly 286.249 mL. A 10.00 mL aliquot of this reconstituted lotion was treated with an excess of potassium fluoride, which effectively masked the iron in the sample. After adjustment of the pH to a value of 9.4594, it was discovered that 15.2298 mLs of 0.01658 M EDTA was required to titrate the remaining zinc. What is the percent of ZnO in the solid sample derived from the original lotion?

Reference no: EM13641315

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