a) Use Table 18.a or Apendix C to calculate the Kb of the nitrite ion, NO2-? Sig

ID: 955928 • Letter: A

Question

a) Use Table 18.a or Apendix C to calculate the Kb of the nitrite ion, NO2-? Sig Figs

(b) What is Ka of the 2-hydroxyethylammonium ion, HOCH2CH2NH3+ (pKb of HOCH2CH2CH2NH2 = 4.49)? SIg Figs

Table 18.a below

Iodic acid-1.6x10-1

Chlorous acid-1.12x10-2

Nitrous acid 7.1x10-4

Hydrofluoric acid-6.8x10-4

Formic acid-1.8x10-4

Benzoic acid-6.3x10-5

acetic acid-1.8x10-5

Propanoic acid-1.3x10-5

Hypochlorous acid-2.9x10-8

Hypobromous acid-2.3x10-9

Hydrocyanic acid-6.2x10-10

Phenol-1.0x10-10

Hypoiodous acid-2.3x10-11

a) Ka for HNO2 = 7.1 x 10^-4

Kb = Kw/Ka = 1 x 10^-14/7.1 x 10^-4 = 1.41 x 10^-11

b) pKb for 2-hydroxyethylammonium ion = 4.49

pKa = 14 - pKb = 14 - 4.49 = 9.51

pKa = -log[Ka]

Ka = 3.09 x 10^-10

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.