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Q 1118001800.     `K_p` for the reaction
`CuSO_4 .3H_2O_(s) + 2H_2O_(g) → CuSO_4 .5H_2O_(s)` is `1.0 × 104` `atm^(-2)` at certain temperature.
What lowest relative humidity of air can be achieved using `CuSO_4 .3H_2O` as drying agent at that temperature? Aqueous tension at the given temperature `= 16` torr
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)