Problem 73

A 1.912-g sample of calcium chloride is decomposed into its constituent elements and found to contain 0.690 g Ca and 1.222 g Cl. Calculate the mass percent composition of Ca and Cl in calcium chloride.

Solution 73P

Here, we are going to calculate the percent composition of Ca and Cl in calcium chloride.

Step 1:

Mass percentage gives the concentration of an element in a compound. Mathematically, it can be calculated by the following formula:

Mass percent of an element X = (mass of the element X / total mass of compound) x 100 %

Step 2:

Given, mass of the calcium chloride sample = 1.912 g

Mass of Ca in the sample = 0.690 g

Mass of Cl in the sample = 1.222 g