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chemistry

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Which of the following substances can act as a Bronsted acid in aqueous solution? (Select all that apply.)
C3H8
NH41+
HCl
H2
H2O
H2CO3
PH3
Which of the following substances can act as a Bronsted base in aqueous solution? (Select all that apply.)
PH3
PH41+
CO32-
SO42-
H2
CH4
NH3

  • chemistry -

    Instead of me going through and simply giving you the answers, tell me what you don't understand about these two questions.

  • chemistry -

    I do not understand how to determine if the substance is an bronsted acid or base

  • chemistry -

    If the substance can donate a proton, it is a Bronsted acid. If it can accept a proton, it is a Bronsted base.
    examples:
    Bronsted acid. HCl or NH4^+
    HCl + H2O ==> H3O^+ + Cl^-
    NH4^+ + H2O ==> H3O^+ + NH3

    Bronsted base. NH3 or CO3^-2
    NH3 + HOH ==> NH4^+ + OH^-
    CO3^-2 + HOH ==> HCO3^- + OH^-

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