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Which of the following electrolytes is m...

Which of the following electrolytes is most effective in the coagulation of gold sol ?

A

`NaNO_3`

B

`K_4[Fe(CN)_6]`

C

`Na_3PO_4`

D

`MgCl_2`

Text Solution

Verified by Experts

The correct Answer is:
D
Gold sols are negative charged sols, thus are coagulatd by positive charge particles. As `Mg^(2+)` bears maximum charge, thus has minimum flocculation value (0.72 millimoles/lt)
Hence, `MgCl_2` is the correct answer.
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