MHT CET2011ChemistryIonic Equilibrium
The solubility product of Ag ₂ CrO ₄ is 32 10⁻¹² . What is the concentration of CrO ₄²⁻ ions in that solution?
Options
- A2 10⁻⁴
- B16 10⁻⁴
- C8 10⁻⁴
- D12 10⁻⁴
Correct answer
A. 2 10⁻⁴
Step-by-step solution
aligned Ag ₂ CrO ₄ 2 Ag ⁺+ CrO ₄²⁻ & 2 s K_ sp &= [ Ag ⁺ ]² [ CrO ₄²⁻ ] &=(2 s)²(s) K_ sp &=4 s³ s &= ( K_ sp 4 )^ 1 / 3 &= ( 32 10⁻¹² 4 )^ 1 / 3 &=2 10⁻⁴ M aligned