Question

Answer true or false. A 163 g solution containing 8.0 mg of NaCl is 49 ppm.

O True
O False

Answer 1

• True

Step-by-step explanation:

The unit ppm is parts per million.

In grams that is:

• grams of solute in 1,000,000 grams of solution

Here, the solute is 8.0mg of NaCl. That is 0.0080g.

The solution is 163 g.

Then, set a proportion:

0.0080g NaCl / 163g solution = x / 1,000,000g solution

• x = 1,000,000 g solution × 0.0080g NaCl / 163g solution

• x = 49.08 ppm

Round to two significant figures = 49 ppm ← answer