Table of Strong Acids and Strong Bases 1

Hydrochloric Acid

Hydrochloric acid, HCl.

This is a list of the strong acids and strong bases. There aren’t very many, so it’s a good idea to memorize┬áthem, if you can.

Table of Strong Acids

The strong acids ionize completely in water to yield or or more protons per acid molecule.

Name Formula Ionization
hydrogen iodide or hydroiodic acid HI H+(aq) + I(aq)
hydrogen bromide or hydrobromic acid HBr H+(aq) + Br(aq)
perchloric acid HClO4 H+(aq) + ClO4(aq)
hydrochloric acid HCl H+(aq) + Cl(aq)
chloric acid HClO3 H+(aq) + ClO3(aq)
sulfuric acid H2SO4 H+(aq) + HSO4(aq)*
nitric acid HNO3 H+(aq) + NO3(aq)

* HSO4 is a weak acid that contributes additional protons.

Table of Strong Bases

The strong bases ionize completely in water to yield or or more hydroxides per base molecule.

Name Formula Ionization
sodium hydroxide NaOH Na+(aq) + OH(aq)
potassium hydroxide KOH K+(aq) + OH(aq)
lithium hydroxide LiOH Li+(aq) + OH(aq)
rubidium hydroxide RbOH Rb+(aq) + OH(aq)
cesium hydroxide CsOH Cs+(aq) + OH(aq)
calcium hydroxide Ca(OH)2 Ca2+(aq) + 2OH(aq)
barium hydroxide Ba(OH)2 Ba2+(aq) + 2OH(aq)
strontium hydroxide Sr(OH)2 Sr2+(aq) + 2OH(aq)

Calcium hydroxide, barium hydroxide, and strontium hydroxide are not very soluble in water.

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