chem exam 3 Flashcards
(19 cards)
what is the relationship between Ka and pKa
inverse, so larger Ka = smaller pKa
what does Ka show
acid strength
what is a bronstead acid/base
acid can donate a proton
base can accept a proton
how does bond strenght effect acid strength in binary acids
stronger bonds= weaker acids
what are binary acids
only composed of 2 elements
what are polyatomic acids
composed of 3+ elements
how does electronegativity effect acidity
electronegativity increases then acid strength increases
what is Kw
the ion-product constant of water
how does pOH relate to pH
it is the opposite of pH so
pOH>7 = acidic while pH>7= basic
what are the strong acids
hclo4
h2so4
hi
hbr
hcl
hno3
what are the strong bases
lioh
naoh
koh
ca(oh)2
sr(oh)2
ba(oh)2
what do A- HA and stand for
conjugate base and acid respe.
how do pH and pKa relate
pH<pKa>pKa there is more base conc</pKa>
what is a buffer solution made of
a WEAK acid and its conjugate base
what is a buffer capacity and what does it mean
it is how well a biffer is at resisting pH change
if buffer capacity is high then there is more resistance to a pH change
what does the equivalence point on titration curve show
tells the HA value
what does the half equivalence point tell
tells the pKa value of HA
what are lewis bases and acids
lewis base- donates an electron
lewis acid- accepts and electron
