A) >9.72mm
B) <7.92mm
C) >7.92mm
D) < 11.92mm
Correct Answer: B
Solution :
[b] The efflorescent salts loss water to atmosphere \[{{K}_{p}}=p_{{{H}_{2}}O}^{2}=1.086\times {{10}^{-4}};\] \[{{p}_{{{H}_{2}}O}}=1.042\times {{10}^{-2}}atm=7.92mm\] If \[{{H}_{2}}O\] pressure at \[25{}^\circ C\] is less than 7.92 mm. The reaction \[CuS{{O}_{4}}.5{{H}_{2}}O\left( s \right)\xrightarrow{{}}CuS{{O}_{4}}.3{{H}_{2}}O\left( s \right)+{{H}_{2}}O\left( g \right)\] will not proceed in RHS.You need to login to perform this action.
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