x Flashcards
what is an alkali?
soluble base
define a Bronsted- Lowry acid
proton donor
define a Bronsted- Lowry base
proton acceptor
conjugate acid- base pair
contains 2 species that can be interconverted by transfer of a proton
monobasic acid definition
donates 1 proton
dibasic acid definition
donates 2 protons
tribasic acid definition
donates 3 protons
acid + metal
salt + hydrogen
acid + carbonate
salt + water + carbon dioxide
acid + base
salt + water
acid + alkali
salt + water
define pH
pH=-log[H+(aq)]
define [H+(aq)]
[H+]=10^-pH
what is a strong acid?
fully dissociates in aqueous solution
how can the pH of a strong acid be calculated?
directly from the concentration of the acid
what is a weak acid?
partially dissociates in aqueous solution
write the general form for the dissociating of any weak acid, HA
HA(aq) ⇄ H+(aq) + A-(aq)
acid dissociation constant, Ka equation
Ka= [H+(aq)][A-(aq)]/[HA(aq)]
what are the units for Ka?
moldm⁻³
how are Ka and pKa linked?
pKa=-logKa
write the general form for the dissociating of any weak acid, HA
HA(aq) ⇄ H+(aq) + A-(aq)
the stronger the acid…
- larger the Ka value
- smaller the pKa value
the weaker the acid…
- smaller the Ka value
- larger the pKa value
the weaker the acid…
- smaller the Ka value
- larger the pKa value