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Rank the following species in order of increasing basicity. NH3, NH4 , NH2-, Cl-,H2O.
a. NH3
b. NH4
c. NH2
d. Cl-
e. H2O

Sagot :

Answer:

D, E, A, B, C

Explanation:

The weakest base would be Cl- because HCl is a stronger acid than that of H3O+ from which the water is formed.

Also, for NH3 is a stronger acid than +NH4. Reason is that oxygen is more electronegative than nitrogen and thus NH3 is a stronger acid than NH4+.

The stronger, the acid, the weaker its conjugate base. Thus, NH3 is a weaker base than NH4.

NH2- has the highest basicity because nitrogen is less of an electronegative element than is oxygen. Therefore, it will not want a negative charge.

Hence, the final order in terms of increasing basicity is;

Cl-, H20, NH3, NH4, NH2-

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