Question
Asked Nov 2, 2019
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Ammonia is a weak base that reacts with water according to this equation:

                     NH3(aq)  +   H2O(l)     ⇌     NH4+(aq)  +    OH (aq)

Will any of the following increase the percent of ammonia that is converted to the ammonium ion in water?

(a) Addition of NaOH (b) Addition of HCl (c) Addition of NH4Cl.

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Expert Answer

Step 1

The given reaction, ammonia reacting with water is an equilibrium reaction. According to Le Chateliar’s principle, the equilibrium of a system is disturbed by an external factors like (change in pressure, temperature or concentration) is applied to a system, the equilibrium will change in such a way as to reduce the effect of the external factors.

Step 2

The dissociation of ammonia in water:

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Image Transcriptionclose

NH& (aq) OH(aq) NH3(aq)H20)

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Step 3

a)Addition of NaOH will not increase the percent conversion of NH3 to NH4+ ions.

NaOH is a strong base which dissociates into Na+ and OH- ions.This would increase the concentration of OH- ions a...

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Chemistry

Equilibrium Concepts

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