<p>Gravimetric Analysis Practice Problems </p><p>1. Outline the steps that are required to solve a typical gravimetric analysis problem.</p><p>2. A 2.00g sample of limestone was dissolved in hydrochloric acid and all the calcium present in 2+ the sample was converted to Ca (aq).</p><p>Excess ammonium oxalate solution, (NH4)2C2O4(aq), was added to the solution to precipitate the</p><p> calcium ions as calcium oxalate, CaC2O4(s).</p><p>The precipitate was filtered, dried and weighed to a constant mass of 2.43g.</p><p>Determine the percentage by mass of calcium in the limestone sample.</p><p>3. A 3.00- g sample of an alloy (containing only Pb and Sn) was dissolved in nitric acid (HNO3). </p><p>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?</p><p>4. An empty crucible has a mass of 12.770 grams. The crucible and hydrate have a mass of 13.454 grams. After heating, the crucible and anhydrous salt have a mass of 13.010 grams. . What is the formula of this hydrate of MgSO4 ?H2O?</p>