Write with equation the formation of scum in chemistry
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When a soap is used in hard water, a solid substance we call scum forms. This is because charged calcium and magnesium particles (called ions ) present in the water react with soap to form an insoluble substance. Scum builds up on clothes, baths and sinks. Detergents do not form scum.
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2 C17H35COO−Na+ + Ca2+ → (C17H35COO)2Ca + 2 Na.
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