HKDSE Chemistry Question Review (2025-04-18)

校園

#1 HTTP ERROR 404

18/04/25 02:25

Question: Is oxygen acidic or alkaline?

#2 HTTP ERROR 404

18/04/25 02:28

Solution:

O2 is a lone pair electrons donar. In organic chemistry, it is called a Lewis base. Oxygen is an organic base then.

#3 HTTP ERROR 404

18/04/25 02:31

2 HF + O2 = OF2 + H2O

Clearly heterolytic fission occurs on O2.

#4 HTTP ERROR 404

18/04/25 02:32

2 HF + O2 = OF2 + H2O

Clearly heterolytic fission occurs on O2.

Note that the oxidation number of F atoms is always -1, so th reaction is neutralization.

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