pH Question

Started by affanbilal, April 17, 2024, 10:07:46 PM

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affanbilal

I do not understand how to do this questionScreenshot 2024-04-17 220652.png

uma

Ammonia is a base and concentrations of ammonia is important for pH calculations. Here pH is determined by calculation of [OH-] by making rice table and using Kb value.
Kb = [OH-][NH4+]/[NH3]
[OH-]= Kb[NH3/[NH4+]
so as  decreases  also decreases and pOH increases and hence pH decreases.
So B is the right option.

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