1.

The solubility product of As_(2)S_(3) is 2.8 xx 10^(-72). What is the solubility of As_(2)S_(3)

Answer»

`1.09 xx 10^(-15)` mole/litre
`1.72 xx 10^(-15)` mole/litre
`2.3 xx 10^(-16)` mole/litre
`1.65 xx 10^(-36)` mole/litre

Solution :`K_(sp) = [As^(3+)][S^(2-)]`,
`S = 5sqrt((K_(sp))/(108)) = 5sqrt((2.8 xx 10^(-72))/(108)) = 1.09 xx 10^(-15)`


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