titrations

Question 1

what is the millimole

Answer 1

mL times molarity = mmol

Question 2

describe titration of strong acid

Answer 2

initial - concentration of acid = H+ pH = -log(H+)
before equivalence point - do BR/AR leftover H+/total volume then pH = -log(H+)
at equivalence point - pH = 7
after equivalence point - do BR/AR leftover OH-/total volume then pOH = -log(OH-) (H+ + OH- –> H20)

Question 3

describe titration of weak acid

Answer 3

initial - ice table, ka, find H+
before eq point - BR/AR use buffer equation
at half eq point - pH = pKa
at eq point - BR/AR, kb, find OH-, find pOH then pH
after eq point do BR/AR leftover OH-/total volume then pOH = -log(OH-) (H+ + OH- –> H20)

Question 4

describe titration of strong base

Answer 4

initial - OH-
eq point = pH = 7
after eq = governed by acid leftover

Question 5

describe titration of weak base

Answer 5

same as weak acid but switched

Question 6

indicator for titration of acid

Answer 6

[In-]/[HIn] = 1/10

Question 7

indicator for titration of base

Answer 7

[In-]/[HIn] = 10/1

Question 8

when do indicators change colour

Answer 8

one unit above and below pKa
pKa - 1
pka + 1