Chemicals added to a mixture to make suspended particles clump together
Question
Chemicals added to a mixture to make suspended particles clump together
Solution
The chemicals added to a mixture to make suspended particles clump together are known as flocculants or coagulants. Here's a step-by-step explanation:
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The process begins with the addition of a coagulant to the mixture. This is usually a substance like aluminium sulphate or ferric chloride. These chemicals neutralize the charge of the particles in the mixture, which causes them to start clumping together.
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The clumps that form are known as 'flocs'. However, these flocs are still quite small and can easily be broken apart.
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To help the flocs grow in size and strength, a flocculant is added. This is a polymer that encourages the flocs to stick together and form larger clumps.
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The larger clumps are easier to separate from the rest of the mixture. This can be done through a process like sedimentation, where the mixture is left to stand and the clumps sink to the bottom, or filtration, where the mixture is passed through a filter that catches the clumps.
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Once the clumps have been separated, the remaining liquid is much clearer and cleaner than it was at the start of the process. This is why flocculation is often used in water treatment processes.
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