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How can I tell a conjugate base from a regular base and a conjugate acid from a regular acid? For example, in:

H2O + HONH3 (reversible arrows) HONH2 + H3O+

What is the acid, base, conjugate base, conjugate acid? Is there no base and conjugate base since HONH3 is an acid?

The H2O accepted a proton to become H3O^+; therefore, H2O must be a base and the H3O^+ is the conjugate acid.
HONH3 donated a proton so HONH3 must be the acid and HONH2 is the conjugate base. Check my thinking.

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2 answers
  1. There is no base, only acid and conjugate base
    the HONH3 acts as the acid here, and the HONH2 is its conjugate base. its the same exact thing as if the equation were
    HONH3 >< HONH2 + H(+)

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  2. H2O is actually your base

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