Chemistry - Ionic Equilibrium Question with Solution | TestHub

ChemistryIonic EquilibriumBuffer solutionMedium2 minQB

ChemistryMediumnumerical

Passage / Comprehension

An anion 'P' gives colourless and suffocating odour containing volatile product with dil HCℓ and

decolourises acidified permanganate solution. 'P' forms white precipitate (soluble in dil acid) with BaCℓ₂ solution.

The same anion (P) liberates 'Q'(gas) , when it is treated with a mixture of 'Zn' and NaOH_(excess)

$(1 mole) (Q) NaOH (1 mole) (S) NaOH (1 mole) (T)$

Determine the pH of solution obtained, when 1 mole of 'Q', 2 moles of 'S' and '3' moles of 'T' are dissolved in 1 lit of water at 25°C

[if pKa₁ = 7 and pKa₂ = 12 ; log₁₀(2) = 0.3 ]

Answer:

11.70

Solution:

$= 12 + lo g (\frac{2}{4}) = 12 - 0.3 = 11.70$

Stream:JEESubject:ChemistryTopic:Ionic EquilibriumSubtopic:Buffer solution

⏱ 2mℹ️ Source: QB

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