Question

75.0 mL of water is added to 12.9 mL of 0.250 M KMnO4. What is the concentration of the diluted solution? O 1.70 M O 1.45 M O 0.0581M O 0.0430 M 0 0.0367 M

Answer 1

When the solvent is added in a solution, than the volume of solution increases and the concentration decreases. This is process of dilution. The concentration and the volume of dilute and concentrated solution are given as follows: CV = CV, Concentrated solution Dilute solution Given that M1=0.250 M Vi= 12.9 ml M2= ? V2= 75.0 ml+12.9 ml= 87.9 ml M1V1=M2V2 M2= M1 V1/V2 = 0.250*12.9/87.9 = 0.0367 M