Gen Chem II: Exam 3 Flashcards
(69 cards)
what happens at the eq. pt.?
moles of titrant equals moles of analyte
when the indicator changes color
end point
how are indicators chosen?
they must change color near the eq. pt. pH
pH indicators are —
organic acids and dyes
SB/SA the pH at the eq. pt. is —
7
SA/SB before the eq. pt., pH is determined by —
excess acid
SA/SB after the eq. pt., pH is determined by —
excess base
WA/SB half eq. pt.
mid point
the mid point is located where
in the buffer region
WA/SB — equals — at the mid-point
pH, pKa
WA/SB the pH at the equivalence point is — bc —
greater than 7, the reaction bt the conjugate base and water
WA/SB before the titration begins, pH is determined by —
the weak acid and Ka
WA/SB after the titration begins, but before the eq pt, you have a — and pH can be calculated by —
buffer, H-H equation
WA/SB at the eq pt, pH is determined by the —
conjugate base and Kb
WA/SB after the eq pt, pH is determined by —
excess added base
WB/SA the pH at the eq pt is — bc of —
less than 7, reaction bt conjugate acid and water
WB/SA before the titration begins, pH is determined by —
weak base and Kb
WB/SA after the titration begins, but before the eq pt, you have a — and pH can be calculated by —
buffer, H-H equation (must convert to pKa)
WB/SA at the eq pt, pH is determined by the —
conjugate acid and Ka
WB/SA after the eq pt, pH is determined by —
excess added acid
amino acids are —
polyprotic acids
an amino acids contains a — and a — in the same molecule
weak acid and weak base
how much of a salt can dissolve in a given amount of solvent at a given temp
solubility
units of molar solubility
M
