The species among the following, which can act as an acid and a base is:
A
HSO−4
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B
SO2−4
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C
H3O+
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D
Cl−
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Solution
The correct option is CHSO−4 The species among the following, which can act as an acid and a base is HSO−4. Such species are called amphoteric species. HSO−4+H+→H2SO4 HSO−4→SO2−4+H+