Question

What is the total mass of solute in 1000. grams of a solution having a concentration of 5 parts per million?

Answer 1

Answer: The correct answer is (1).

Explanation:

Concentration of the solute in 1000 g of solution: 5 parts per million

1 part per million = 1 milligram/Liter

Then , 5 parts per million = 5 mg/liter

This means that 5 milligrams of solute is present in 1 liter solution.

1 gram = 1000 milligrams

Then 5 milligram = $5\times \frac{1}{1000} g$ = 0.005 grams

Answer 2

Parts per million is one way of expressing concentration. Usually, it is used in describing a solute in water. One parts per million or one ppm is equal to 1 milligram of solute per liter of solution or 1 milligram of solute per kg solution. Thus, the total mass of the solute is 0.005 g.