Question

Removing Impurities from Water
Different methods are used to remove soluble and insoluble impurities from water.
Removing Insoluble impurities
Insoluble impurities such as sand can be removed by filtration or sedimentation
Filtration: In this method, insoluble impurities are removed by passing the impure water
through a filter paper.
A mixture of sand and water can be
Mixture of sand and
separated by filtration. A circular piece of
water
filter paper is taken and folded twice to make
a cone. This paper cone is placed inside a
Filter paper
funnel. A flask is kept below the funnel and
the mixture is poured into it through the
funnel. Sand is retained on the filter paper
Clean water
and clean water is obtained in the flask.
Sand
Sedimentation and Decantation It involves
the following steps.
Filtration




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