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Physical Chemistry Stoichiometric Point and Purity of Sample? - sample physical therapy aide cover letter

Suppose 1.331 g of impure barium hydroxide is dissolved in water sufficient to produce 250. ml and 35.0 ml of this solution is titrated to the equivalence point with 17.6 ml of 0.0935 M HCl (aq). What is the percentage purity of the original sample?

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