Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
MHT CET 202626 AprilMorning Shift
Exam
MHT CET
Year
2026
Date
26 April
Shift
Morning Shift
Subject
Chemistry
Chapter
Ionic Equilibrium

MHT CET 2026 · 26 April · Morning Shift · Chemistry · Ionic Equilibrium

What amount of NaOH should be dissolved in a 500 mL solution, so...

What amount of NaOH should be dissolved in a 500500 mL solution, so that the pH\text{p}^\text{H} of solution is 1212 at 298298 K ?

Options

  1. A11 g
  2. B22 g
  3. C0.20.2 g
  4. D0.40.4 g

Correct answer

C. 0.20.2 g

Step-by-step solution

Given pH=12\text{pH} = 12

pOH=14−12=2\text{pOH} = 14 - 12 = 2

[OH−]=10−2 M[\text{OH}^{-}] = 10^{-2} \text{ M}

Since NaOH is a strong base, the concentration of NaOH is 10−2 M10^{-2} \text{ M}.

Volume of the solution V=500 mL=0.5 LV = 500 \text{ mL} = 0.5 \text{ L}

Number of moles of NaOH =M×V=10−2×0.5=0.005 mol= M \times V = 10^{-2} \times 0.5 = 0.005 \text{ mol}

Molar mass of NaOH =40 g/mol= 40 \text{ g/mol}

Amount of NaOH required =0.005×40=0.2 g= 0.005 \times 40 = 0.2 \text{ g}

Answer: 0.20.2 g
Practice Ionic Equilibrium on Quantrex Academy →

More from Ionic Equilibrium

Which of the following buffer solutions is used for precipitation of cations of the III A… MHT CET Medical 2026The degree of dissociation of weak acid is directly proportional to MHT CET Medical 2026Which from the following is Lewis base? MHT CET Medical 2026The solubility of Fe(OH)_3 is x mole per liter. Find its K_ sp . MHT CET Medical 2026The Basic buffer solution is made with 0.1\ M\ NH_4OH and 0.2\ M\ NH_4Cl . If K_b for the… MHT CET Medical 2026The hydrogen ion concentration of the ocean is about 2 × 10^ -9 \ M . What is the pOH of… MHT CET Medical 2026Calculate the dissociation constant of a weak monobasic acid if it is 0.04% dissociated… MHT CET Medical 2026Calculate the solubility of AgCl in mol/dm^3 at 25\ ^ ^ ∘ C . Given: K_ sp \ (AgCl) = 1.8… MHT CET Medical 2026 Full Ionic Equilibrium list All MHT CET Medical PYQs