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| (a) | Calcium metal was placed in hydrochloric acid. |
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| (b) | A solution of copper (II) sulfate, CuSO4, was poured into a galvanized (zinc-coated) bucket. |
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| (c) | Copper metal was dipped in a solution of sodium chloride, NaCl. |
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| (d) | Silver nitrate, AgNO3, and potassium chloride, KCl, are mixed. |
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| (e) | Potassium chloride, KCl, is mixed with iodine, I2. |
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| (f) | Aluminum sulfate, Al2(SO4)3, and barium nitrate, Ba(NO3)2, solutions are mixed. |
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| (g) | Sulfuric acid, H2SO4, and potassium hydroxide, KOH, solutions are mixed. |
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| (h) | A potassium bromide, KBr, solution is mixed with chlorine, Cl2, gas. |
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