SOLID-LIQUID PHASE DIAGRAMS: SALT SOLUTION This page looks at
the phase diagram for mixtures of salt and water - how the
diagram is built up, and how to interpret it. It includes a
brief discussion of solubility curves. Important: This page is
only really designed to be an introduction to the topic suitable
for courses for 16 -18 year olds, such as UK A level chemistry.
If you have come to this page straight from a search engine, it
would pay you to read the page about the tin-lead phase diagram
first. This is a rather easier system to talk about and
introduces some of the ideas that you will need. Two typical
solubility curves A solubility curve shows how the solubility of
a salt like sodium chloride or potassium nitrate varies with
temperature. The solubility is often (although not always)
measured as the mass of salt which would saturate 100 grams of
water at a particular temperature. A solution is saturated if it
won't dissolve any more of the salt at that particular
temperature - in the presence of cryst