Chemical EquilibriumHard
Question
The first and second dissociation constants of an acid H2A are 1.0 × 10-5 and 5.0 × 10-10 respectively.
The overall dissociation constant of the acid will be
The overall dissociation constant of the acid will be
Options
A.5.0 × 10-5
B.5.0 × 1015
C.5.0 × 10-15
D.0.0 × 105
Solution
H2A ⇋ HA- + H+ K1 = 
.....(1)
HA- ⇋ H+ + A2- K2 =
.....(2)
For the reaction
H2A ⇋ 2H+ + A2-
K =
= K1 × K2
= 1 × 10-5 × 5 × 10-10
= 5 × 10-5
Hence, (3) is correct.
.....(1)HA- ⇋ H+ + A2- K2 =
.....(2) For the reaction
H2A ⇋ 2H+ + A2-
K =
= K1 × K2 = 1 × 10-5 × 5 × 10-10
= 5 × 10-5
Hence, (3) is correct.
Create a free account to view solution
View Solution FreeMore Chemical Equilibrium Questions
Solid ammonium carbamate dissociates as: NH2COONH4(s) $\rightleftharpoons$2NH3(g) + CO3(g). In a closed vessel, solid am...From the following data, (i) H2(g) + CO2(g) $\rightleftharpoons$ H2O(g) + CO(g); K2000 K = 4.4(ii) 2H2O(g) $\rightleftha...The value of ᐃH for the reactionX2(g) + 4Y2(g) ⇋ 2XY4(g) is less than zero. Formation of XY4(g) will be favo...Calculate equilibrium constant (approx) at 25oC for the cell reaction Fe(s) + CuSO4 ⇋ FeSO4 + Cu(s)Given : EoFe/Fe...The reactions PCl5(g) ⇋ PCl3(g) + Cl2(g) and COCl2(g) ⇋ CO(g) + Cl2(g) are simultaneously in equilibrium at ...