Question

How many grams of chlorine gas are needed to make 6.10 x10 g of a solution that is 1.90 ppm chiorine by mass? Number g CI

Answer 1

Given:-

mass of solution = 6.10 $\times$ 10⁶ g

concentration of chlorine solution (ppm) = 1.90

mass of chlorine gas = ?

As we know that

Concentration in ppm = mass of solute $\times$ 10⁶ / mass of solution

so

mass of solute =  Concentration in ppm $\times$ mass of solution / 10⁶

therefore

mass of chlorine gas = concentration of chlorine solution (ppm) $\times$ mass of solution / 10⁶

mass of chlorine gas = 1.90 $\times$ 6.10 $\times$ 10⁶ g / 10⁶

mass of chlorine gas = 1.90 $\times$ 6.10 g

mass of chlorine gas = 11.59 g (i.e the answer)