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Qabool Chaudhuri
Asked: 2022-11-11T05:03:46+05:30 In:

For the coagulation of `500mL` of arsenious sulphide sol, `2mL` of `1MNaCl` is required. What is the flocculation value of `NaCl` ?

For the coagulation of `500mL` of arsenious sulphide sol, `2mL` of `1MNaCl` is required. What is the flocculation value of `NaCl` ?
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  1. Correct Answer – 4
    2mL of 1M NaCl contains `NaCl=(2)/(1000)=2` mmol
    Thus 500 mL of `As_(2)S_(3)` sol require NaCl for complete coagulation=2mmol
    Hence 1L, i.e., 1000 mL of the sol reqruie NaCl for complete coagulation=4mmol
    Therefore, flocclation value of NaCl=4

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