Dilutions (brian)

Diluting solutions:-when two solutions are mixed the concentration changes
-dilutions is the process of decreasing the concentration by adding a solvent (usally water)
-the amount of solute does not change
n1=n2-because concentration is mol/L we can write C=n1Vand
n=CV
so C1V1=C2V2

Example: determine the concentration when 200ml of 0.20M HCL is diluted to a final volume of 400ml
               (0.20mol/l)(0.200L)=C2(0.400L)
               C2=0.1M