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A solution is prepared by mixing 50.0 mL of 0.50 M Cu(NO3) 2 with 50.0 mL of 0.50 M Co(NO3) 2. Sodium hydroxide is slowly added to the mixture. Which precipitates first? [Ksp(Cu(OH) 2) = 2.2 × 10-20, Ksp(Co(OH) 2) = 1.3 × 10-15]
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