138. Solving a chemistry problem
Seller: Derkach
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Product description
96.0.0921 g of chromic anhydride was dissolved, treated with KI, and the released iodine was titrated with 23.75 cm3 of a Na2S2O3 solution with T Na2S2O3 = 0.01354 g / cm3. What percentage of CrO3 is in the sample?