There are 3 theories… Arrhenius (most common) Bronsted-Lowry Lewis

Arrhenius Bronsted-Lowry Lewis Theory includes more chemical reactions.

Arrhenius (most common): an acid gives H + and a base gives OH - Hydrochloric acid H + + Cl - Sodium hydroxide Na + + OH -

But NH 3 in water is basic.. NH 3 + H 2 O  NH OH - base acid proton acceptor proton donor

Conjugate Acid Conjugate Base

Bronsted-Lowry: an acid is a proton (H + ) donor and a base is a proton acceptor

Bronsted base acid Bronsted acid base

Bronsted base acid Bronsted acid base

Bronsted base acid Bronsted acid base AMPHOTERIC

But what if no protons are being donated or accepted?

What is being donated and accepted?

Electron Pair Acceptor Electron Pair Donor Lewis Acid Lewis Base

Lewis: An acid is an electron pair acceptor and a base is an electron pair donor

Here’s another example…

Use HCl (g) + H 2 O to show all three theories.