Donates a proton
Accepts a proton
pH less than 0-6.9
Frees hydronium (H+) ions when
mixed with water
Turns litmus paper pink
Turns litmus paper blue
Conducts electricity
pH 7.1-14
Conducts electricity
Examples are acetic acid, citric
acid, phosphoric acid,
hydrochloric acid
Examples are sodium hydroxide, ammonia,
sodium bicarbonate, potassium hydroxide,
aluminum hydroxide, magnesium hydroxide
Frees hydroxide ions (OH-)
when mixed with water
Feels slippery or soapy
Reacts with metal to give
off hydrogen gas
Tastes sour
Tastes bitter or chalky