Chemistry - GOC Question with Solution | TestHub
ChemistryGOCAcid BaseMedium2 minQB
ChemistryMediumsingle choice
Predict the direction of the following equilibrium and the approximate value of Keq.
NH₃ + OH⁻ NH₂⁻ + H₂O (pKa : NH₃ = 33, H₂O = 15.74)
Options:
Answer:
B
Solution:
An acid-base equilibrium always favours the side with the weaker acid (the higher pKa). The acid on the left is NH₃ (pKa 33) and the acid on the right is H₂O (pKa 15.74); NH₃ is far weaker, so the equilibrium lies far to the left. Keq ≈ 10¹⁵·⁷⁴⁻³³ = 10⁻¹⁷·²⁶·
Stream:JEESubject:ChemistryTopic:GOCSubtopic:Acid Base
⏱ 2mℹ️ Source: QB
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