Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main201912 Apr 2019Morning ShiftChemistryIonic EquilibriumActual

What is the molar solubility of A I O H 3 in 0.2 M N a O H solution? Given that, solubility product of Al O H 3 = 2.4 × 10 - 24 :

Options

  1. A3 × 10 - 19
  2. B12 × 10 - 21
  3. C12 × 10 - 23
  4. D3 × 10 - 22

Correct answer

D. 3 × 10 - 22

Step-by-step solution

Concept of common - i o n will be applicable for O H - group. Al OH 3 ⇌ A l 3+   S          + 3 O H - 3 s + 0.2 K s p for A l O H 3 = 2.4 × 10 - 24 = s 3 s + 0.2 3 Looking at K s p , it is clear that s will be much lesser than 0.2 . Or, s ≪ 0.2 s × 0.2 3 = 2.4 × 10 - 24 ⇒ s = 2.4 × 10 - 24 / 0.008 or, s = 3 × 10 - 22

Practice Ionic Equilibrium on Quantrex Academy →

More from Ionic Equilibrium

Given is a concentrated solution of a weak electrolyte A_xB_y of concentration 'c' and dissociation constant 'K'. The degree of dissociation is given by : 2026M₃ A₂ is a sparingly soluble salt of molar mass y g mol ⁻¹ and solubility x g L ⁻¹ . The ratio of the molar concentration of the anion ( A³⁻ ) to the solubility product of the salt 2026Arrange the following resultant mixtures in increasing order of their pH values A. 10 mL 0.2 M Ca(OH)₂ + 25 mL 0.1 M HCl B. 10 mL 0.01 M H₂ SO₄ + 10 mL 0.01 M Ca(OH)₂ C. 10 mL 0.1 202620 mL of a solution of acetic acid required 28.4 mL of 0.1 M NaOH for its neutralization. A solution (X) was prepared by mixing 20 mL of the above acetic acid and 14.2 mL of 0.1 M 2026The pH of a solution obtained by mixing 5 mL of 0.1 M NH₄OH solution with 250 mL of 0.1 M NH₄Cl solution is _____ 10⁻² . (Nearest integer) Given: pK_b(NH₄OH) = 4.74 2 = 0.30 3 = 0. 2026The first and second ionization constants of a weak dibasic acid H₂ A are 8.1 10⁻⁸ and 1.0 10⁻¹³ respectively. 0.1 mol of H₂ A was dissolved in 1 L of 0.1 M HCl solution. The conce 2026At 25°C , 20.0 mL of 0.2 M weak monoprotic acid HX is titrated against 0.2 M NaOH. The pH of the solution (a) at the start of the titration (when NaOH has not been added) and (b) w 2026The solubility product constants of Ag₂CrO₄ and AgBr are 32x and 4y respectively at 298 K. The value of ( molarity of Ag₂CrO₄ molarity of AgBr ) can be expressed as : 2026 Full Ionic Equilibrium list All JEE Main PYQs