10. Acid-base reactions and Ka Flashcards
an alkalis is a
base that dissolves in water forming OH-(aq) ions
neutalisation is a
chemical reaction in which an acid and a base react together to produce salt and water
a strong acid is an
acid that completely dissociates in solution
a weak acid is an
acid that partially dissociates in solution
the acid dissociation constant (Ka) of an acid HA is defined as…
it measures…
Ka= [H+(aq)] [A-(aq)] / [HA(aq)]
the extent of acid dissociation
PKa=
-log Ka
a more manageable number of Ka
Ka=
10 to the power of -pKa
typical acid base reactions
aqueous acids react with with carbonates bases and alkalis
in all of these reactions a neutralization reaction occurs. water is formed as one of the products.
when acids release protons in water they are usually accepted by water to form a
hydronium ion H3O+ (sometimes called oxonium ion)
H+ and H3O can be used interchangeably when describing aqueous ion solutions
H+ is usually used in ionic equations
aqueous acids react with solid carbonates to form
salt, carbon dioxide and water
aqueous acids react with bases forming
salt and water
aqueous acids react with alkalis forming
salt and water
aqueous acids react with metals forming
salt and hydrogen
why does the reaction between acid and metal not fit in with acid-base model
it is a redox reaction.
most common strong acids (100% dissociate in water)
HCl hydrochloric acid HNO3 nitric acid H2SO4 sulfuric acid HBr hydrobromic acid HI hydriodic acid HClO4 chloric (VII) (perchloric) acid
