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Module 1: The MOLE concept

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Chemistry - The mole concept and aqueous solutions

The mole concept and aqueous solutions

Large numbers of chemical reactions occur in aqueous solutions. Amounts of
solutions are usually measured by volume.

Common units for volume are litres (L) and millilitres (mL), where 1 L =
10 mL.

Just as chemical amount (mol) and mass (g) are linked by molar mass (g
mol), then chemical amount (mol) and volume (L) are linked by molar
concentration (mol L).

Molar concentration, symbol c, which has the units moles per litre (mol
L), is often expressed as molarity, units M.

For example, a 1 molar solution of hydrochloric acid, 1.0 M HCl(aq), has a
molarity c(HCl) = 1.0 mol L.

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