Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
AIIMS 2001
Exam
AIIMS
Year
2001
Subject
Chemistry
Chapter
Ionic Equilibrium

AIIMS 2001 · Chemistry · Ionic Equilibrium

The pH value of decinormal solution of NH_4 OH which is 20 \%...

The pH\mathrm{pH} value of decinormal solution of NH4OH\mathrm{NH}_4 \mathrm{OH} which is 20%20 \% ionised is

Options

  1. A12.95
  2. B12.30
  3. C14.70
  4. D13.30

Correct answer

B. 12.30

Step-by-step solution

Concentration of NH4OH\mathrm{NH}_4 \mathrm{OH} solution =0.1N=0.1 \mathrm{ N} Concentration of OH−\mathrm{OH}^{-} ions in solution, [OH−]=20% of 0.1N=20100×0.1=0.02N\begin{aligned} {\left[\mathrm{OH}^{-}\right]=20 \% \text{ of }0.1 \mathrm{ N}} & =\frac{20}{100} \times0.1 \\ & =0.02 \mathrm{ N} \end{aligned} ⇒pOH=−log⁡[OH−]=−log⁡(0.02)=2−0.301=1.699⇒pH=14−pOH=12.30\begin{array}{rlrl} \Rightarrow \quad \mathrm{pOH}=-\log \left[\mathrm{OH}^{-}\right]& =-\log (0.02) \\ & =2-0.301=1.699 \\ \Rightarrow \quad & & \mathrm{pH}=14-\mathrm{pOH}& =12.30 \end{array}
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… MHT CET Medical 2026Which 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 2026 Full Ionic Equilibrium list All AIIMS PYQs