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What is hardness? Distinguish between temporary and permanent hardness
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written 6.6 years ago by |
Hardness can be defined as "the soap consuming capacity of water simple" OR it prevents the lathering of soap.
eg. 2c17H35COONa+CaCl2→Ca[C17H35COO]2↓+2NaCl
Sodium stearate Hardness Calcium stearate
Soluble soap Insoluble soap
ie. Long chain fatty acids.
2c15COOk+CaCl2→Ca[C17H35COO]2↓+2KCl
$Potasium linolate \ \ \ \ \ Hardness \ …