Laboratory

Question 1

Concentration (C)

Answer 1

The concentration of a solution is dependant on the amount (mg) of substance and the volume (mL) it is in

Question 2

Dilutions

Answer 2

The concentration of a substance is reduced.
The final volume (V2 is made up of two components, the diluent and the initial volume (V)

V2 = V1 + diluent

Question 3

Dilution Factor (DF)

Answer 3

DF = C1/C2 = V2/V1

Where C1 is the concentration before dilution
C2 is the concentration after dilution
V1 is the volume before dilution
V2 is the volume after dilution

If a solution is diluted 2 fold, this means it contains 1 volume of undiluted solution together with 1 volume of diluent.

So if a solution was diluted 15 fold, this would mean it contained one volume of undiluted solution, together with 14 volumes of diluent.

Question 4

The relationship between concentration and volume before and after a dilution.

Answer 4

C1V1 = C2V2

Where
C1 is the concentration before dilution
C2 is the concentration after dilution
V1 is the volume before dilution
V2 is the volume after dilution