What is the conjugate acid for H2O (water)?

2 Answers
Ghadeer A.
Nov 10, 2015

hydronium ion, H_3O

Explanation:

As a general rule "rough method" , add a proton (H) to make conjugate acid. Remove a proton to make a conjugate base.
In water H_2O adding a proton gives you the hydronium ion H_3O

anor277
Nov 26, 2015

The conjugate acid is simply the original species PLUS a proton, H^+. The conjugate base is simply the original species LESS a proton, H^+.

Explanation:

In both instances, mass and charge are conserved. If we add a proton to water we get H_3O^+, the hydronium ion, which is an hypothetical species but is nevertheless useful for acid/base calculations.

Given this, you know that the conjugate base for water is OH^-, the hydroxide ion, and its conjugate acid is the hydronium ion, H_3O^+. Can you tell me the conjugate base for sulfuric acid, bisulfate ion, and hydroxide ion? Please give the answers in this thread.

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