Question

A 14.0 wt% solution of CaCl 2 ( 110.98 g/mol) has a density of 1.126 g/mL. What is the mass, in milligrams, of a 19.2 mL solution of 14.0 wt% CaCl 2

Answer 1

2.16 × 10⁴ mg

Step-by-step explanation:

A 14.0 wt% solution of CaCl₂ (110.98 g/mol) has a density of 1.126 g/mL. The density (ρ) of a solution is equal to the quotient between its mass (m) and its volume (V).

ρ = m/V

We can use this expression to find the mass of 19.2 mL of the 14.0 wt% solution of CaCl₂.

ρ = m/V

m = ρ × V

m = 1.126 g/mL × 19.2 mL

m = 21.6 g

1 gram is equal to 1000 milligrams. The milligrams corresponding to 21.6 grams are:

21.6 g × (1000 mg/1 g) = 2.16 × 10⁴ mg