Question

the diagram below shows calcium chloride. calcium chloride is a white salt that is used to de - ice roads, as a food additive, and as a food preservative. use the diagram to write the correct chemical formula for calcium chloride.

Explanation:

Step1: Determine the charges

Calcium (\(\ce{Ca}\)) has a charge of \(+2\) (as it is in Group 2 of the periodic table). Chloride (\(\ce{Cl}\)) has a charge of \(-1\) (as it is in Group 17 of the periodic table).

Step2: Balance the charges

To balance the charges, we need two chloride ions (\(\ce{Cl-}\)) for one calcium ion (\(\ce{Ca^{2+}}\)). So the chemical formula is \(\ce{CaCl2}\).

Answer:

\(\ce{CaCl2}\)