5.2 pH and buffers Flashcards
what is a bronsted-lowry acid
a species that donates a proton
what is a bronsted-lowry base
a species that accepts protons
how many protons do monobasic acids have to donate?
1
how many protons do dibasic acids have to donate
2
pH equation
how many times would the conc of H increase as pH increases from 4-5
10 times
[H+] =
is water an acid or a base
it can act as both
equation for the partial dissociation of a weak acid, HA
equilibrium for Ka of weak acid
what is Ka dependant on?
temp
pKa =
Ka =
what does a larger vaule of Ka/smaller vaule of pKa =
stronger acid
what does a smaller vaule of Ka/larger vaule of pKa =
weaker acid
titration curve of a strong acid and strong base
titration curve of a strong acid and weak base
titration curve of a weak acid and strong base
titration curve of a weak acid and weak base
how do buffers work?
keep the conc of hydrogen ions and hydroxide ions constant by shifting the position of equilibrium
what are acidic buffers made from?
mixture of a weak acid and a soluble salt of that acid
what happens if an alkali is added to an acidic buffer solution
the OH- ions react with the HA, removing the OH- and shifting to give water and A-
what happens if an acid is added to an acidic buffer solution
