Question

Carbon dioxide gas has a solubility of 0.0972 g/100 g H2O at 40 degrees celsius. Expressed in parts per million, this concentration is closest to...

(1)0.972 ppm
(2)9.72 ppm
(3)97.2 ppm
(4)972 ppm

Answer 1

The easiest way to do these is to remember the conversion that
1 ppm = 1 mg/L
0.0972 g/100 g H2O = 0.0972/100 mL = 0.972 g/L = 972 mg/L = 972 ppm

Answer 2

972

Answer 3

972 ppm

Answer 4

You can just divide 0.0972 g by 100 g and then multiply that number by 1 million because ppm= grams of solute/grams of solution x 1,000,000.

Answer 5

Kanznz