Question

a. b. Complete and balance the following molecular equations. Write the net ionic equations. To receive full credit, you must indicate the form of each product as (s). (1, (g) or (aq). (12 pts.) - Al(CIO4)3(aq) + Na2CO3(aq) Ba(OH)2(aq) +_ HI(aq) → _CuCl2 (aq) + _ Zn(s) - Cobalt(II) nitrate is used to make catalysts for the synthesis of hydrocarbons from carbon monoxide and hydrogen. 18.189 g of cobalt(II) nitrate hexahydrate (FW 291.03 g/mole) is dissolved in water to the mark of a 500.0 mL volumetric flask. a. Calculate the molarity of the cobalt(II) nitrate solution. (7 pts.) b. A 10.00 mL sample of the solution above is pipetted into a 250.0 mL volumetric flask and diluted with water to the mark. Calculate the molarity of the nitrate ion in the diluted solution. (4 pts.)

Answer 1

6 Naci ay 2 A16C104)3 caq) + 3 NG, Cogcaq? AlgCO3)(8) + 6 NACIO4 coa) Net ionic eq? 2A13* + 3 CO32- Al2(CO3)3 (5) 2) Ba(OH)2 (aq) + 2 HI(aq) — Ba I2camt 2 H 2° caq) No precipitare formed. No nee ionic ec. CuCl2!aq) + Locs) - Cuataq) - Gucs) Gus) + 2n612(aq) ... set ionic ed? de 1 X Amount of COCNO3)2-6110 %) as molavity = - molar mass GOCNO3)2-6440 vol.(dm3) molarity = 18.189 * I 0.5 291.03 = 1 0.125 m b) mive = M2V2 0.125 x 10 mL = m2 x 250 mL M2= 0.005 m molanty of CO (NOG), diluted = 0.005 m 1. COCNO3)2 colt + 2 No 3 :: molarity of nitrate ion = 270.005 -0.01m