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Introduction to Acids and Bases

AP Chemistry· difficulty 2/5

HCO3- in water HCO3- + H2O <-> H2CO3 + OH- (HCO3- as base) HCO3- + H2O <-> CO3^2- + H3O+ (HCO3- as acid)

What term best describes HCO3-?

  • A

    Strong acid

  • B

    Spectator ion

  • C

    Strong base

  • D

    Amphiprotic (it can donate or accept H+)

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Explanation

HCO3- can both donate and accept a proton, so it is amphiprotic (or amphoteric).

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