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

question 87

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( )  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.

---

Definitions:

Placebo Effect

A psychological phenomenon where a person experiences a perceived improvement in condition after receiving a treatment that has no therapeutic effect.

Nonalcoholic Drink

A beverage that contains no alcohol, often including soft drinks, juices, tea, coffee, and water.

Intoxicated

A state of being under the influence of alcohol or drugs, leading to impaired judgment, motor skills, and cognitive functions.

Placebo Effect

A phenomenon where a patient experiences a perceived improvement in condition due to a belief in the efficacy of a treatment that has no therapeutic value.