Question

A solution whose volume is 500.0 mL contains 10.0 mg of glucose (C6H12O6). What is the concentration of glucose in ppm by mass, assuming that the density of the solution is 1.00 g/mL?a)10.0b)20.0c)5000d)500.0

Answer 1

Answer:

The concentration by mass is 20 ppm (option b)

Explanation:

Step 1: Data given

Volume = 500.0 mL = 0.5 L

Mass of glucose = 10 mg = 0.01 grams

Density = 1g/mL

Step 2: Calculate the mass of the solution

1.00 g/mL * 500.0 mL = 500 grams

Step 3: Calculate ppm by mass

10.0 mg of glucose / 500 grams = 20.0 mg / 1000 grams = 0.02 mg/ gram

0.02mg/ gram = 20 ppm

The concentration by mass is 20 ppm