Gravimetric Analysis 1. A 0.8870 g sample containing only NaCl and KCl was treated with AgNO3. The AgCl formed had a mass of 1.913 g. Calculate the %Na and %K in the sample. 2. In the analysis of 0.7011 g of an impure chloride containing sample, 0.9805 g of AgCl were precipitated. What is the percentage by mass chloride in the sample? 3. A 3.00- g sample of an alloy (containing only Pb and Sn) was dissolved in nitric acid (HNO3). Sulfuric acid was added to this solution, which precipitated 1.69 g of PbSO4. Assuming that all of the lead was precipitated, what is the percentage of Sn in the sample?

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