Molarity

Molarity

Moles solute/Liters solution

Molality

Moles solute/kg solvent

Percent concentration

Part (solute)/Whole (solution) x 100

Mass percent

Mass of solute g/Mass of solution g x 100

Mass of solution

Mass of solute + Mass of solvent

Percent mass/volume

Mass of solute, g / volume of solution ML x 100

Volume percent

Volume of solute (mL) / volume of solution (mL) x 100

Mole fraction

Fractiion of the moles of one component in the total moles of the solution (total of all moles = 1) unitless

mole percentage

percentage of the moles of one component in total moles of the solution = mole fraction x 100

preparing a solution

amount of solution and concentration

Stock solutions

basically the base, you dilute it more to get the concentration you want. The amount of solute won’t change, just the volume of solution. Concentration and volumes are proportional

Mc x Vc = moles solute

moles of solute NEVER change