Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEETChemistryIonic Equilibrium

Determine the concentration of AgNO ₃ required to reduce the solubility of Ag ₂ CrO ₄ to 1 10⁻⁸ M . Given that the solubility product ( K_ sp ) of Ag ₂ CrO ₄ is 4 10⁻¹² .

Options

  1. A4 10⁻⁴ M
  2. B1 10⁻² M
  3. C2 10⁻⁴ M
  4. D2 10⁻² M

Correct answer

D. 2 10⁻² M

Step-by-step solution

The target solubility of Ag ₂ CrO ₄ is s = 1 10⁻⁸ M . The dissociation of the sparingly soluble salt is: Ag ₂ CrO ₄(s) 2 Ag ^+(aq) + CrO ₄²⁻(aq) From the stoichiometry, the concentration of chromate ions is equal to the solubility: [ CrO ₄²⁻] = s = 1 10⁻⁸ M Let the required concentration of AgNO ₃ be c . Since AgNO ₃ is a strong electrolyte, it completely dissociates to give [ Ag ^+] c (neglecting the very small amount of Ag ^+ from Ag ₂ CrO ₄ ). The solubility product expression is: K_ sp = [ Ag ^+]^2[ CrO ₄²⁻] Su

Practice Ionic Equilibrium on Quantrex Academy →

More from Ionic Equilibrium

What amount of NaOH should be dissolved in a 500 mL solution, so that the p ^ H of solution is 12 at 298 K ? 2026Which of the following buffer solutions is used for precipitation of cations of the III A group? 2026The degree of dissociation of weak acid is directly proportional to 2026Which from the following is Lewis base? 2026The solubility of Fe(OH) ₃ is x mole per liter. Find its K_ sp . 2026The Basic buffer solution is made with 0.1 M NH ₄ OH and 0.2 M NH ₄ Cl . If K_b for the base is 1.8 10⁻⁵ , what is the pH of the buffer? 2026The hydrogen ion concentration of the ocean is about 2 10⁻⁹ M . What is the pOH of ocean? 2026Calculate the dissociation constant of a weak monobasic acid if it is 0.04% dissociated in a 0.01M solution. 2026 Full Ionic Equilibrium list All NEET PYQs