175 mL of a 1.6 M solution of KCl is diluted to a new volume of 1.0 L. What is the new concentration of the solution?

0.13 M KCl

0.28 M KCl

0.85 M KCl

1.1 M KCl

The basic equation for diluting solutions is:

(M1) (V1) = (M2) (V2)

M1 and V1 belong with the stock solution, the stronger one.

The mL has to be turned into liters, so convert first. 175 mL =.175 L

So, 1.6 M represents M1 and. 175 L represents V1. 1.0 is V2 because it's asking for the new concentration, which is M2. Therefore, M2 is the variable you're looking for.

Plugging it in:

(1.6M) (.175) = (M2) (1)

Simplify and Solve:

.28 = M2