1. What is the percent water in calcium chloride dihydrate, CaCl2.2H2O? 2. A 2.50-gram sample of CuSO4 .xH2O is heated, releasing the water. After heating, 1.59 g of the anhydrous salt (CuSO4) remains. What is the empirical formula of the hydrate? 3. A hydrate is found to have 48.8 g MgSO4 and 51.2 g H2O. What is the empirical formula? 4. A 13.52 g sample of Magnesium Sulfate hydrate is heated in a crucible. The crucible contains 6.60 g of anhydrous salt after the second heating. What is the formula of the hydrate? Mg = 24.3; S = 32; O = 16; H = 1. P a g e | 102 Name: Exp. 08 Water of Hydration Post Lab Questions (2 of 2) 5. A 5.00 g sample of NiCl2 .xH2O is heated, driving off 2.28 g of water. What is the empirical formula of the hydrate? Ni = 58; Cl = 35.5; H = 1; O = 16. 6. A 1.74 g sample of K2CO3 hydrate is heated, losing 0.36 g of water. Find the empirical formula. of the hydrate. K = 39; C = 12; O = 16; H = 1. 7. In Part A of the experiment, you reported a % value which is lower than 36.1%. Briefly discuss what may have gone wrong? 8. In Part A of the experiment, you reported a % value which is higher than 36.1%. Briefly discuss what may have gone wrong?