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Unformatted text preview: 5 NH 3 Cl is dissolved in water to make 150.0mL of solution, what is the initial molarity of the cation? (b) Write the chemical equation for the proton transfer reaction of the cation with water, identify the acid and the case in this reaction. 7. Determine the oxidation number of the italicized element in each of the following ions: (a) Al O 2-(b) N O 2-(c) SO 3-(d) Ni Cl 4- (e) Br F 3 + 8. Suppose that 25.0 mL of 0.50M K 2 CrO 4 (aq) reacts with 15.0mL of AgNO 3 (aq) completely. What mass of NaCl is needed to react completely with 35.0mL of the same AgNO 3 solution? 9. A chemist wants to extract the gold from 35.25g of AuCl 3 2H 2 O, by electrolysis of an aqueous solution. What mass of gold could be obtained from the sample? 10. A metal forms an oxide with the formula M 2 O 3 , for which the mass percentage of the metal is 69.9%. What is the molar mass of the metal?...
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