All of the following are characteristic features of solubility product EXCEPT:
Correct answer: C. It is applicable if the molar concentration of ions is greater than 0.1M
- A. If solubility is known, then Ksp can be calculated
- B. If Ksp is known, then solubility can be calculated
- C. It is applicable if the molar concentration of ions is greater than 0.1M
- D. The term Ksp is related with reversible processes
Explanation
Ksp concept is valid only for saturated solutions in which the total concentration of ions is no more than about 0.01 moldm-3. This means that it is quite inappropriate to use the solubility product concept for soluble compounds such as NaCl, CuSO4 etc. It is applicable for sparingly soluble salts.
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About Chemical Equilibrium
Reversible reactions reach dynamic equilibrium when forward and reverse rates become equal, and Le Chatelier's principle predicts the effect of changing concentration, pressure or temperature. The chapter also covers solubility product, the common ion effect, buffer action and the conditions used in Haber's process, with equilibrium shifts distinguished from changes in the equilibrium constant.
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All of the following are applications of Kc EXCEPT:
The standard enthalpy and entropy changes for the reaction in equilibrium for the forward reaction are given below. CO (g) + H2O (g) <----> CO2 (g) + H2 (g)∆Hº 300K = - 41.16 kJ mol-1∆Sº 300K = - 4.24 x 10^-2 kJ mol-1∆Hº 1200K = - 32.93 kJ mol-1Then, the incorrect statement is :