Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
MHT CET Medical202625 April 2026Morning ShiftChemistryIonic EquilibriumActual

The hydrogen ion concentration of the ocean is about 2 10⁻⁹ M . What is the pOH of ocean?

Options

  1. A8.85
  2. B5.3
  3. C7.85
  4. D8.7

Correct answer

B. 5.3

Step-by-step solution

Given [H^+] = 2 10⁻⁹ M The pH of the solution is calculated as: pH = - [H^+] pH = - (2 10⁻⁹) = 9 - 2 Using 2 = 0.3010 : pH = 9 - 0.3010 = 8.699 8.7 We know that at 25^ C , pH + pOH = 14 pOH = 14 - pH pOH = 14 - 8.7 = 5.3 Answer: 5.3

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? 2026Calculate the dissociation constant of a weak monobasic acid if it is 0.04% dissociated in a 0.01M solution. 2026Calculate the solubility of AgCl in mol/dm ^3 at 25 ^ C . Given: K_ sp ( AgCl ) = 1.8 10⁻¹⁰ 2026 Full Ionic Equilibrium list All MHT CET Medical PYQs