Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
Most Important Selected Qs for JEE AdvancedChemistryIonic Equilibrium

5.35 g of a salt ACl (of weak base AOH ) is dissolved in 250 ml of solution. The pH of the resultant solution was found to be 4.827 . Find the ionic radius of A ⁺ and Cl ⁻ if ACl forms CsCl type crystal having 2.2 ~g / cm ^3 . Given K _ b ( AOH ) =1.8 10⁻⁵, r ⁺ r ⁻ =0.732 for this cell unit (mark the anser in Å )

Correct answer

1.715

Step-by-step solution

ACl ( s ) A ⁺( aq )+ Cl ⁻( aq ) A ⁺( aq )+ H ₂ O AOH ( aq )⁻+ H ⁺( aq ) At equilibrium C (1- ) C C For salts of weak base and strong acid, = K _ w K _ b [ H ⁺ ]= C = K _ w C K _ b 10^ -4.827 = 1 10⁻⁴ 1.8 10⁻⁵ 5.35 1000 M 250 M=53.5 For CsCl type structure = z M a^3 6.023 10²³ a = [ 1 53.5 2.2 6.023 10²³ ]^ 1 / 3 =3.43 År_A⁺+r_ C r = 3 2 a=0.866 a =0.866 3.43 Å=2.97 Å r_ A⁺ r_ C- =0.732 On solving r_ A⁺ =1.255 Å r_ C l⁻ = 1 . 7 1 5 Å

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 Most Important Selected Qs for JEE Advanced PYQs