concentration

is a quantity that express the quantitative relationship between the solute and solvent.

Units of concentration

a. Molarity (M)

is the number of moles of solute in 1 liter of solution

b. Normality (N)

is the number of equivalents of solute in 1 liter of solution

c. Molality (m)

is the number of moles of solute in 1000 grams of solvent

d. Percentage (%) in the mass and volume

is the number of grams of solute per 100 grams of solution

e. Mole fraction (%)

is the mole ratio of substances in solution on the number of moles of all substances in solution

f. Parts per million (ppm / ppm)

expressed in parts by weight per million parts.