
3.1 Hanner Hafaliadau
Authored by E Evans
Chemistry
9th - 12th Grade
Used 4+ times

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10 questions
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1.
MATCH QUESTION
5 mins • 5 pts
Cysylltwch y gell gyda'r lliw
Gwyrdd
Mn2+ + 4H2O
Di-liw
Cr2O72- + 14H+ +6e-
Brown
MnO4- + 8H+ + 5e-
Porffor tywyll
2Cr3+ + 7H2O
Oren
I2 + 2e-
2.
CATEGORIZE QUESTION
5 mins • 6 pts
Rhowch yr adweithyddion yn y categori cywir.
Groups:
(a) Ocsidyddion
,
(b) Rhydwythyddion
I-
Br2
MnO4-
O2
Fe2+
C2O42-
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
I2 + ?? --> 2I-
e-
2e-
2p+
p+
4.
FILL IN THE BLANK QUESTION
1 min • 1 pt
MnO4- + 8H+ +5e- --> Mn2+ + ????
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cr2O72- + 14H+ 6e- --> ?
2Cr3+ + 7H2O
2CrO4- + 4H2 + 3H2O
2Cr6+ + 7H2O
2CrO2 + 5H2O + 2H2
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
???? --> Fe3+ + e-
Fe
Fe+
Fe2+
7.
MATCH QUESTION
5 mins • 10 pts
Parwch nifer yr electronau i'r elfennau.
(Bydd cyflyrau ocsidiad yn helpu)
5e-
2S2O32- --> S4O62- + ???
4e-
MnO4- + 8H+ + ??? --> Mn2+ + 4H2O
2e-
Fe2+ --> Fe3+ + ???
6e-
Cr2O72- + 14H+ + ??? --> 2Cr3+ + 7H2O
1e-
O2 + ?? --> 2O2-
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