Solutions are a mixture between two components, the less abundant component is the solute and the more abundant is the solvent.
Solute can be solid, liquid or gas.
Solvent is generally a liquid.
Salt water is a solution with salt as the solute and water as the solvent.
They are called aqueous solutions and are given the state symbol (aq).
Concentration has two units, either g dm^-3 or mol dm^-3
Concentration = Mass of solute / Volume of solvent
Concentration = Moles of solute / Volume of solvent
g dm^-3 = mol dm^-3 x molar mass
1.5.2 Solve problems involving concentration, amount of solute and volume of solute.
This equation will be least likely to be a question on its own. However it is used in a lot of different questions to test your basic knowledge.
Examiner's Tip : In Paper 1 you can find the best solution with less precise relative atomic mass values. This makes the calculation easier and saves time. For papers 2 and 3 estimate the answer before you use a calculator. This will help spot careless mistakes.
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