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100 mL of a colloidal solution is comple...

100 mL of a colloidal solution is completely precipitated by addition of 5 mL of 1 M NaCl solution. Calculate the coagulation value of NaCl.

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The correct Answer is:
50
Coagulation value is the millimoles of an electrolyte that must be added to 1 L of a colloidal solution for complete coagulation.
`:.5mL` of `1MNaCl=(1)/(1000)xx5`
=0.005 mol or 5 mmol
100 mL of a colloidal solution required NaCl for complete coagulation = 5 mmol Therefore, 1 L of colloidal solution requires NaCl for complete coagulation = 50 mmol Therefore, coagulation value of NaCl = 50
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