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    What is the purpose of a drying agent, and how does it work?
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    (Original post by stanners 27)
    What is the purpose of a drying agent, and how does it work?
    to dry = to remove water or water vapour

    If you are dealing with water impurity in a solid, it can be left in a dessicating jar with a drying agent such as silica gel or concentrated sulphuric acid.

    If you are dealing with water impurity in an organic liquid, it may be shaken with a drying agent such as anhydrous magnesium sulphate, which then absorbs the water and can be filtered off.

    A gas may be passed through a suitable drying agent to remove water vapour. An acidic gas such as carbon dioxide or sulphur dioxide can be passed through concentrated sulphuric acid.
 
 
 
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