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PES Allowed Attempts 5 Question 16 When a solution of potassium hydroxide and zinc chloride are mixed what precipitate if any is formed? Not yet wed Marked out of 100 Select one @ a. KCI (s) and Zn(OH), (s) @ b. Zn(OH)2 (5) cKCI) O d. No precipitate Do 17 Not awwered Med out of 100 Sodium thiosulfate, Na,s,, is used as a fixer in photographic film developing. The amount of Na, 530, in a solution can be determined by a titration with lodine, I, according to the equation: 2N0 5,0 (09) +1:00) > Na $+2Nal(aq). Calculate the concentration of the Na S, solution f 40.70 mL of a 0.1550 Mly solution react exactly with a 1000 m. sample of the Na: 5,0, solution. Use 4 sig. fig Aside, the end of the titration is determined by the color. Nalis a pale yellow and I, a deep purple. Just when the purple color persists, all the iodine that can react has reacted