As for the solubility, usually it is marked as following,
Based on 20 Celsius and 100grams of solvent, such as water, the maximum
mass that a solid substance can dissolve is its solubility:
1. Insoluble: the maximum mass is less than 0.01grams;
2. Microsolubility(slight solubility): the maximum mass between 0.01grams
to 1gram;
3. Soluble: the maximum mass between 1gram to 10grams;
4. Freely soluble:the maximum mass is more than 10grams;
5. Easy soluble: the maximum mass is more than 50grams.
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