D. Copper(II) Sulfate Solution with Ammonia 1. What is the evidence for the first shift in equilibrium when the NH3(aq) was added dropwise to the Cu2+ solution? 2. (a) Explain how adding more NH3(aq) caused the equilibria to shift again. (b) What did you observe in the Cu2+ system to indicate that the shift had occurred? 3. a) Explain how 3 M sulfuric acid caused the equilibria to shift back again. (b) What did you observe to indicate that the reaction shifted to the left?

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