객관식
Which of the following species is/are amphoteric?
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17. Acid and Base Equilibrium
Amphoteric Species
객관식
Which of the following species is amphiprotic within an aqueous solvent?
a) Br– b) HC2H3O2 c) SO42– d) HSe– e) H3O+
A
Br–
B
HC2H3O2
C
SO42–
D
HSe–
E
H3O+
검증된 단계별 안내1
Understand the concept of amphiprotic species: An amphiprotic species is one that can both donate and accept a proton (H+). This means it can act as both an acid and a base.
Analyze each option to determine if it can donate and accept a proton: a) Br– is a bromide ion and cannot donate a proton, so it is not amphiprotic. b) HC2H3O2 is acetic acid, which can donate a proton but not accept one, so it is not amphiprotic.
Continue analyzing: c) SO42– is a sulfate ion, which cannot donate a proton, so it is not amphiprotic. d) HSe– is a hydrogen selenide ion, which can donate a proton to form Se2– and accept a proton to form H2Se, making it amphiprotic.
Evaluate the last option: e) H3O+ is the hydronium ion, which can donate a proton to form H2O but cannot accept another proton, so it is not amphiprotic.
Conclude that the species HSe– is the only one that can both donate and accept a proton, making it amphiprotic in an aqueous solution.
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