01Concentration
A solution is a homogeneous mixture. Molarity M = mol solute / L solution.
Dilution keeps moles constant: M₁V₁ = M₂V₂.
02Notebook box
Make solutions with a volumetric flask; dilute by adding solvent to the line.
Worked example: 50.0 mL of 2.00 M diluted to 250 mL → 0.400 M.