Calcium Hydride (CaH₂) Is So Reactive with Water That It $\rightarrow$

question 55

Multiple Choice

Calcium hydride (CaH₂) is so reactive with water that it can be used to remove traces of water from solvents other than water. If 24.6 g of calcium hydride is added to a large volume of solvent that contains 14.0 g of water, which of these remains, water or calcium hydride, after the reaction is complete? The reaction is:
CaH₂(s) + 2H₂O(l) $\rightarrow$ Ca(OH) ₂(s) + 2H₂(g)

• A) CaH₂ will be left over.
• B) Water will be left over.
• C) Both will be completely consumed.
• D) There is no way to tell.

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