Pka and Pkb
Authored by Charles Martinez
Chemistry
11th - 12th Grade
NGSS covered
Used 4+ times
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11 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
calculate the Ka of a solution with a pKb of 3.38
3.38x10-11
6.76x10-11
2.40x10-11
2.39x10-11
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
calculate the pKb of solution with a pKa of 6.9
7.1
6.5
14
9.6
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Calculate the Kb of a solution that has a pKb of 4.2
0.62
6.3x10-5
9.8
4.2
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The magnitude of Kw indicates that ______________.
water autoionizes very slowly
water autoionizes very quickly
water autoionizes only to a very small extent
the autoionization of water is exothermic
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How would you calculate Kb for the formate ion (HCOO–), given that the Ka for formic acid (HCOOH) is 1.8 × 10–4? (Kw=1.0 × 10–14)
Kb = Ka × Kw
Kb = Kw / Ka
Kb = Ka / Kw
Kb = Kw + Ka
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In which of the following aqueous solutions does the weak acid exhibit the highest percentge of ionization?
.01 M HC2H3O2 . (Ka 1.8 x 10 -5)
.01 M HNO2 . ( Ka =4.5 x 10 -4)
.01 M HClO . (Ka= 3.0 x 10 -8)
.01 M HF (Ka= 6.8 x 10 -4)
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
HA is a weak acid. Which equilibrium corresponds to the equilibrium constant Kb for A-?
HA (aq) + H2O (l) <---> H2A+ (aq) + OH-(aq)
A- (aq) + H3O+ (aq) <---> HA (aq) + H2O (l)
HA (aq) + OH- (aq) <---> H2O (l) + H+ (aq)
A- (aq) + H2O (l) <---> HA (aq) + OH- (aq)
A- (aq) + OH- (aq) <---> HOA2- (aq)
Tags
NGSS.HS-PS1-2
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