Question

A formula unit of calcium bromide has two bromide ions corresponding to each calcium ion in the compound. What is the formula of calcium bromide?

a. CaBr
b. CaBr2
c. Ca2Br
d. Ca2Br2

Answer 1

The chemical formula of calcium bromide is CaBr2, as it contains one calcium ion (Ca2+) for every two bromide ions (Br-) to maintain electrical neutrality.

Step-by-step explanation:

Chemical Formula of Calcium Bromide

The formula unit for calcium bromide must be electrically neutral and contain one calcium ion to every two bromide ions. Calcium ion has a charge of 2+ (Ca2+), and each bromide ion has a charge of 1- (Br−). Therefore, in order to balance the charges, two bromide ions are needed for every calcium ion, which gives us the formula unit CaBr2.

So, the correct chemical formula for calcium bromide is CaBr2.