Question

Calcium chloride can be used to create a hot pack when it dissolves in water, as shown below. If the hot pack has 20 units of calcium chloride, how many chloride ions will be formed?

Answer 1

Answer: It will produce 40 chloride ions

Explanation: When in water, Calcium chloride separate in ions, as the following chemical equation:

CaCl₂ + H₂O ⇒
`Ca^(+2)_(aq) + 2Cl^(-)_ {aq}`

According to the equation, 1 calcium chloride results in 2 chloride ions, so if there are 20 units of the chemical compound, there will be 2 times as much Chlorine ions, i.e., 40 units of chlorine ions.