
Oxidation Numbers in K2Cr2O7
Interactive Video
•
Chemistry
•
9th - 10th Grade
•
Hard

Liam Anderson
FREE Resource
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9 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the oxidation number of potassium in K2Cr2O7?
+1
+2
0
-1
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which element's oxidation number is not directly known in K2Cr2O7?
Potassium
Chromium
Oxygen
Hydrogen
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the typical oxidation number of oxygen in compounds?
+1
+2
-1
-2
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why must the sum of oxidation numbers in a neutral compound equal zero?
To satisfy the neutrality of the compound
To determine the charge of the compound
To ensure the compound is stable
To balance the equation
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How many chromium atoms are present in K2Cr2O7?
1
2
3
4
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the oxidation number of chromium in K2Cr2O7?
+4
+3
+6
+5
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How is the oxidation number of chromium determined in K2Cr2O7?
By calculating the molecular weight
By using a spectrometer
By measuring the compound's mass
By using the known oxidation numbers of potassium and oxygen
8.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the total oxidation number that the two chromium atoms must add up to in K2Cr2O7?
+8
+6
+12
+10
9.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What rule is used to find the unknown oxidation number in a neutral compound?
The rule of charge balance
The rule of conservation of mass
The rule of oxidation
The rule of neutrality
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