concentration of solutions

Question 1

percent (m/v)

Answer 1

g/ml x 100%

Question 2

percent (m/m)

Answer 2

g/g x 100%

Question 3

percent (v/v)

Answer 3

ml/ml x 100%

Question 4

ppm

Answer 4

solute/solven x 10^6

Question 5

ppb

Answer 5

solute/solvent x 10^9

Question 6

molar concentration (Molarity)

Answer 6

molarity (or molar concentration) which is 
defined as moles of solute per volume of solutions in litre. The unit is 
expressed as M or mol/L.

Please note that sometimes “C” is used as the symbol of molar 
concentration instead of M, and M is only used to show the unit as an 
alternative to mol/L)

Question 7

Concentration formula

Answer 7

c=n/v

Question 8

Moles don’t change where?

Answer 8

moles of solute in stock solution = moles of solute in dilute solution
therefore: C1 × V1 = C2 × V2

Question 9

concentrated vs. dilute

Answer 9

refers to the ratio of solute to solution