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The charge on As(2)S(3) sol is due to th...

The charge on `As_(2)S_(3)` sol is due to the adsorbed :

A

`H^(+)`

B

`OH^(-)`

C

`O^(-2)`

D

`S^(-)`

Text Solution

Verified by Experts

The correct Answer is:
D
`As_(2)S_(3)` colloidal sol is obtained when `As_(2)S_(3)` is saturated with `H_(2)S`:
`As_(2)O_(3)+3H_(2)S rarr As_(2)S_(3)+3H_(2)O`
`As_(2)S_(3)` adsorbs `S^(2-)` ions (common between `H_(2)S` and `As_(2)S_(3)` and thus is negative charged).
`As_(2)S_(3)+H_(2)S rarr As_(2)S_(3) S^(2-): 2H^(+)`
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