If CuSO4.5H2O(s) leftharpoons CuSO4 .3H2O(s) + 2H2O(l) Kp = 1.086 × 10-4 atm2 at 25°C. The efflorescent nature of CuSO4 .5H2O can be noticed when vapour pressure of H2O in atmosphere is

Question

If CuSO4.5H2O(s) leftharpoons CuSO4 .3H2O(s) + 2H2O(l) Kp = 1.086 × 10-4 atm2 at 25°C. The efflorescent nature of CuSO4 .5H2O can be noticed when vapour pressure of H2O in atmosphere is (A) >7.29 mm (B) <7.92 mm (C)  ge 7.92 mm (D) None

Tardigrade Admin · Accepted Answer

An efflorescent salt is one that loses H2O to atmosphere. For the reaction CuSO4.5H2O (s) leftharpoons CuSO4.3H2O(s) + 2H2O(I) KP = (PH2O)2 = 1.086 × 10-4 P' H2O = 1.042 × 10-2 atm = 7.92 mm ∵ If P' H2O at 25°C < 7.92 mm only, then reaction will proceed in forward direction.

Q. If $C u S O_{4} .5 H_{2} O_{(s)} ⇌ C u S O_{4} .3 H_{2} O_{(s)} + 2 H_{2} O_{(l)} K p = 1.086 \times 1 0^{- 4} a t m^{2}$ at $25° C .$ The efflorescent nature of $C u S O_{4} .5 H_{2} O$ can be noticed when vapour pressure of $H_{2} O$ in atmosphere is

$> 7.29$ mm

$< 7.92$ mm

$\geq 7.92$ mm

None

Q. If CuSO4​.5H2​O(s)​⇌CuSO4​.3H2​O(s)​+2H2​O(l)​Kp=1.086×10−4atm2 at 25°C. The efflorescent nature of CuSO4​.5H2​O can be noticed when vapour pressure of H2​O in atmosphere is

>7.29 mm

<7.92 mm

≥7.92 mm

None

An efflorescent salt is one that loses H2​O to atmosphere. For the reaction CuSO4​.5H2​O(s)⇌CuSO4​.3H2​O(s)+2H2​O(I)​ KP​=(PH2​O​)2=1.086×10−4 PH2​O′​=1.042×10−2 atm =7.92 mm ∵IfPH2​O′​ at 25°C<7.92 mm only, then reaction will proceed in forward direction.

Q. If $C u S O_{4} .5 H_{2} O_{(s)} ⇌ C u S O_{4} .3 H_{2} O_{(s)} + 2 H_{2} O_{(l)} K p = 1.086 \times 1 0^{- 4} a t m^{2}$ at $25° C .$ The efflorescent nature of $C u S O_{4} .5 H_{2} O$ can be noticed when vapour pressure of $H_{2} O$ in atmosphere is

$> 7.29$ mm

$< 7.92$ mm

$\geq 7.92$ mm