Question

If 2.0 L of solution is diluted to a new volume of 6.0 L, and the final concentration is 0.30 M, what was the original concentration?

Answer 1

If 2.0 L of solution is diluted to a new volume of 6.0 L, and the final concentration is 0.30 M, what was the original concentration?

Let the initial concentration = M1= ?

Initial volume V1= 2.0 L

After dilution

final Concentration M2= 0.3 M ; Fina, volume V2= 6.0 L

we know M1V1 = M2 V2

M1= M2V2 / V1 = 0.3 M x 6.0 L / 2.0 L = 0.9 M

so initial concentration = 0.9 M