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Column of calcium chloride pellets. What is the purpose of the column in this context?

a) Filtration
b) Absorption
c) Distillation
d) Ion exchange

1 Answer

3 votes

Final answer:

The column of calcium chloride pellets is used for ion exchange in water softening processes to replace unwanted hard water ions with sodium ions.

Step-by-step explanation:

The purpose of a column filled with calcium chloride pellets in the context provided is for ion exchange. During the ion exchange process, hard water ions such as calcium (Ca2+) and magnesium (Mg2+) are replaced with more acceptable ions such as sodium (Na+). This is achieved as the hard water flows through a column containing a resin, which binds the unwanted ions and releases sodium ions into the water.

User Dorjan
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