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Unformatted text preview: + H 2 O (l) + SO 42-(aq) Turns into clear bright blue. Limewater indicates CO 2 4b. CuCO 3(s) CuO(s) + CO 2(g) Powder turned black. Limewater indicates CO 2 4c. 2CuO (s) + C (s) 2Cu (s) + CO 2(g) Limewater indicates CO 2 Questions #2a. What chemical property is shared by copper oxide, copper hydroxide, and copper carbonate? They all react with hydrosulfuric acid. #2b. What evidence do you have that the blue color of a copper sulfate solution is due to the Cu 2+ ion? The Cu 2+ ion is also blue. #2c. What chemical test could you use to distinguish between copper sulfate pentahydrate and copper carbonate, both of which are blue solids?...
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