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  4. Which cleansing agent gets precipitated in hard water?

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Q. Which cleansing agent gets precipitated in hard water?

KCETKCET 2019Chemistry in Everyday Life

Solution:

$2C_{17} H_{35}COONa+CaCI_{2} \to2 NaCI+ \underset{\text{insoluble calcium stearate (soap)}}{\left(C_{17}H_{35}COO\right)_{2} Ca}$