7. A 40 mL of IM HCl at 20C was mixed with 40 ml of LIM KOH at 20C. The final temperature was 26.2C. Calculate the heat of neutralization of the reaction? Density of solution - 1.00 g/mL, specific heat of solution - 4.18 J/g. C. Heat capacity of calorimeter - J/C] a. -51.8 kJ/mol. b. +51.8 kJ/mol. C. +75.2 kJ/mol d. -75.2 kJ/mol. 8. A 2.815 g sample of CuSO4.nH2O was heated until all of the water was removed. Calculate the percentage of water of hydration if the residue after heating weighed 2.745 g? (CuSO4: 160 g/mol, H20:18 g/mol) a. 8.2% b. 15.3% c. 2.5% d. 11.7% 9. A 2.60 g sample of aspirin is dissolved in 95% ethanol, diluted with water, and titrat to the phenolphthalein endpoint with 28.3 mL of 0.12 M NaOH. Calculate the perc purity of acetylsalicylic acid in the aspirin sample. (Acetylsalicylic acid, molar mas 180.2 g/mol) a. 98.7% b. 77.8% c. 23.5% d. 81.7% 10. A 1.1 g sample of a magnesium metal (Mg: 24.3 g/mol) was burned with excess oxygen to give the metal oxide (MgO: 40.3 g/mol). How many grams of metal oxide are produced? a. 2.65 b. 1.82 c. 1.12 d. 10.12 (Q2) Write Tor F