Question

What is the concentration in % mass (m/v) of a solution if you dissolve 1.25 g NaCl in 25.00 mL DI H2O?

Answer 1

`5% ("m/v")`

Explanation:

`%("m/v") = "Mass of solute (grams)"/"Volume of solution (mL)" × 100`

For given solution,

• Mass of solute = 1.25 g
• Volume of solution = 25.00 mL

`%("m/v") = "1.25 g"/"25.00 mL" × 100 = color(blue)"5% (m/v)"`