1. To measure how much something is concentrated you have to know the ratio of solute to solvent.
2. It can be useful b/c it the ability of a substance to dissolve. So if you know how much it can dissolve then you it's maximum concentration.
3. One thing that affects the solubility is molecular size. If a solute has large moleucle then it makes it harder to dissolve things and vice versa.
4. Temperature is needed to break down the solid so that it will be soluable and in liquids as well but it isn't necessary. In a gas it decreases the solubility of a substance.
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