Question

A chemist makes 760. mL of calcium bromide (CaBr) working solution by adding distilled water to 290. mL of a 3.18 M stock

solution of calcium bromide in water.

Answer 1

Concentration of the working solution is 1.213 M

Step-by-step explanation:

Using dilution equation we can calculate the concentration of the working solution

Initial concentration × Initial volume = Final concentration × final volume

In this case;

Volume of working sol = 760 mL

Initial concentration = 3.18 M

Initial volume = 290 mL

Concentration of working sol= ?

Therefore;

3.18 M × 290 mL = 760 mL × y

Concentration of working solution = (3.18 × 290)/760

= 1.213 M

Therefore: the concentration of the working solution is 1.213 M