Soap cannot be used in hard water . why ?
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soap cannot be used in hard water because they will not dissolve in hard water ND they Wil form lather when they r dissolved
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❣️ Éllø❣️
☑️Hardness of water is due to the presence of Ca^2+ and Mg^2+ ions. These ions react with soaps to form curdy white precipitates of Calcium and Magnesium salts of fatty acids.
E.g.,
C17H35COONa+Mg^2+---->
C17H35COONa+Mg^2+---->(C17H35COO)3Mg+2Na+
☑️This scum sticks to the surface of the clothes and hence hard water doesn't produce lather with soaps immediately.
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