1. Write the balanced equation for the hydration of CuSO4. Indicate the physical

Question

1. Write the balanced equation for the hydration of CuSO4. Indicate the physical states using the abbreviations (s), (l), or (g) for solid, liquid, or gas, respectively. Use (aq) to indicate the aqueous phase. Indicate appropriate charges on negative and positive ions if they are formed.

Express your answer as a complete chemical equation including all phases. Do not include water in your answer.

2. A sample solution containing sulfate ions (SO42?) was analyzed and was found to contain 3.5mol of sulfate ions (SO42?).

Calculate the equivalent of sulfate ions (SO42?) present in the solution.

Express your answer numerically.

Explanation / Answer

1.

CuSO4(s)?Cu2+(aq)+SO42?(aq)

2.

each SO4 group has -2 charge

1 mol SO42? = 2 equivalents of SO42?

Therefore,

3.5 mol SO42? = (3.5 mol SO42?)*((2 equivalents SO42?)/(1 mol SO42?) = 7.0 equivalents of SO42?

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