Chemistry - Ionic Equilibrium Question with Solution | TestHub

ChemistryIonic EquilibriumBuffer solutionEasy2 minPYQ_2020
ChemistryEasysingle choice

A buffer solution is prepared by mixing 20 ml of 0.1 MCH3COOHand 40 ml of 0.5 MCH3COONaand then diluted by adding 100 ml of distilled water. The pH of resulting buffer solution is (GivenpKaCH3COOH=4.76)

Options:

Answer:
A
Solution:

pH=pKa+log⁡saltacid
=4.76+log40×0.520×0.1
=4.76+1=5.76
pH of a buffer does not change on dilution

Stream:NTA_ABHYAS_NEETSubject:ChemistryTopic:Ionic EquilibriumSubtopic:Buffer solution
⏱ 2mℹ️ Source: PYQ_2020

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