5 ppm causes the tooth
to become mottled and high concentrations of fluoride
ions can be poisonous (for example, sodium fluoride is
used in rat poison); intravenous injections are always
dissolved in water containing salts at particular ionic
concentrations that match with blood plasma
concentrations and so on In this Unit, we will consider mostly liquid
solutions and their formation This will be followed by
studying the properties of the solutions, like vapour
pressure and colligative properties We will begin with
types of solutions and then various alternatives in
which concentrations of a solute can be expressed in
liquid solution