Oxidation Numbers and Charges
Interactive Video
•
Chemistry
•
10th - 12th Grade
•
Practice Problem
•
Hard
Lucas Foster
FREE Resource
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8 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the overall charge of the calcium dichromate compound?
Positive
Negative
Neutral
Variable
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the oxidation number of calcium in calcium dichromate?
+1
+2
0
-2
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the typical oxidation number assigned to oxygen in compounds?
0
-2
+2
-1
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the equation 2 + 2x - 14 = 0, what does x represent?
Oxidation number of calcium
Oxidation number of oxygen
Oxidation number of chromium
Total charge of the compound
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the oxidation number of chromium in CaCr2O7?
-6
+6
+2
+3
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the charge of the dichromate ion (Cr2O7)?
1+
2-
2+
1-
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which method is suggested as easier for finding the oxidation number of chromium?
Using the atomic mass
Using the charge of the dichromate ion
Using the periodic table
Using the compound's neutrality
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