
Syrer og baser kjemi 2?
Quiz
•
Chemistry
•
12th Grade
•
Practice Problem
•
Hard
BaseThird BaseThird
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24 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Følgende reaksjoner beskriver protolysen av svovelsyre.
H2SO4(aq) + H2O(l) HSO4-(aq) + H3O+(aq) HSO4-(aq) + H2O(aq) SO42-(aq) + H3O+(aq)
Hva er den korresponderende basen til HSO4-?
H2O (l)
H3O+(aq)
H2SO4(aq)
D SO42-(aq)
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hvilket av disse oksidene gir basisk løsning når det løses i vann?
K2O
Al2O3
CO2
SO3
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Gitt at Ka = 3,0 · 10 -8 for likevekten
HOCl (aq) -> H + (aq) + OCl - (aq).
Hva blir Kb for likevekten
OCl - (aq) + H2O (l) -> HOCl (aq) + OH - (aq)?
3,3 · 10-7
3,0 · 10-8
3,0 · 106
3,3 · 107
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ved 20oC er Kw = 6,807 · 10 -15 (mol/L) 2 . Hva er pH i rent vann ved denne temperaturen?
6,667
6,920
7,000
7,084
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
For reaksjonen under er likevektskonstanten mindre enn 1
C6H5COOH(aq) + CN-(aq) -> C6H5COO-(aq) + HCN(aq)
Hva er den sterkeste basen i denne likevekten?
C6H5COOH (aq)
CN- (aq)
C6H5COO - (aq)
HCN (aq)
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hvilken av disse svake syrene har den sterkeste korresponderende basen?
Eddiksyre,
Ka = 1,8 · 10-5 mol/L
Maursyre,
Ka = 1,8 · 10-4 mol/L
Hydrogenfluorid, Ka = 6,3 · 10-4 mol/L
Propansyre,
Ka = 1,3 · 10-5 mol/L
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hvilken av disse syrene er den svakeste?
Askorbinsyre,
Ka = 8,0 · 10 -5 mol/L
Smørsyre,
Ka = 1,5 · 10 -5 mol/L
Borsyre,
Ka = 5,8 · 10 -10 mol/L
Blåsyre,
Ka = 4,9 · 10 -10 mol/L
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