Answer the questions below by selecting the correct answer. Consider the reactio

Question

Answer the questions below by selecting the correct answer.
Consider the reaction of ammonium ion (NH4+) with water:

1. Select the correct chemical equation:
NH4+ (aq) + H2O (l) NH3 (aq) + OH (aq)
NH4+ (aq) + H2O (l) NH3 (aq) + H3O+ (aq)
NH4+ (aq) + H2O (l) NH52+ (aq) + OH (aq)
NH4+ (aq) + H2O (l) NH52+ (aq) + H3O+ (aq)

2.The equilibrium expression for this reaction corresponds to:
Ka

Kb

3.The numerator of the equilibrium expression (from 2) for this reaction (dilute solution) is:

[ H3O+ ]
[ NH3 ]
[ NH52+ ][ H3O+ ]
[ NH4+ ][ H3O+ ]
[ NH52+ ][ OH ]
[ OH ][ NH4+ ]
[ NH3 ][ H3O+ ]
[ NH52+ ]

4. The denominator of the equilibrium expression (from 2) for this reaction (dilute solution) is:

[ NH52+ ]
[ OH ]
[ NH3 ][ H3O+ ]
[ NH3 ][ OH ]
[ NH4+ ]
[ NH4+ ][ OH ]
[ NH3 ]
[ NH4+ ][ H2O ]

Explanation / Answer

NH4+ (aq) + H2O (l) NH3 (aq) + H3O+ (aq) this is the correct equation.

Ka = [ NH3 ][ H3O+ ] / [ NH4+ ][ H2O ]

Kb = [ NH4+ ][ H2O ] / [ NH3 ][ H3O+ ]

this are most likely equlibrium constant

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