1967677
Question 1
Question
What does redox stand for?
Answer
-
OIL RIG
-
Reduction & Oxidation
Question 2
Question
Reduction & oxidation CAN take place on their own?
Answer
- True
- False
Question 3
Question
Oxidation occurs when a species loses one or more electrons
Answer
- True
- False
Question 4
Question
Reduction occurs when a species gains one or more electrons
Answer
- True
- False
Question 5
Question
What is the equation for the combustion of magnesium in oxygen?
Is it an reduction or oxidation reaction?
Answer
-
Mg + 1/202 = MgO Reduction reaction
-
Mg + O2 = MgO Oxidation reaction
-
Mg +1/202 = MgO Oxidation reaction
-
2Mg + O2 = 2Mgo Reduction reaction
Question 6
Question
An oxidising agent is a species (atom, molecule or ion) that oxidises another species by removing one or more electrons.
When an oxidising agent reacts, it is itself reduced
Answer
- True
- False
Question 7
Question
A reducing agent reduces another species by taking one or more electrons from it.
Answer
- True
- False
Question 8
Question
Which one is the correct ionic half equation for the oxidation of Fe^2+ ions.
Answer
-
Fe^2+ (aq) = Fe^3+ (aq) + e^-
-
Fe^2+ = Fe^2+ + 2e^-
Question 9
Question
In the presence of dilute sulfuric acid, potassium manganate (VII) solution is a strong oxidising agent. The Manganese is reduced to MnO4^- ion is reduced to Mn^2+.
Which is the correct half-equation?
Answer
-
MnO4^- = Mn^2+ +3e^-
-
MnO4^-(aq) + 8H^+ (aq) = Mn^2+(aq) + 4H2O (l)
-
MnO4^- (aq) + 8H^+ (aq) + 5^e- = Mn^2+ (aq) + 4H20 (l)
Question 10
Question
In acid solution, ferrate (VI) ions, FeO4^2- can be reduced to Fe^2+ ions.
Which of the following equations shows this?
Answer
-
FeO4^2- (aq) + 8H+ (aq) + 4e^- = Fe^2+ (aq) + 4H20 (l)
-
FeO4^2- (aq) + 4e^- = Fe^2+ (aq) + 4H20 (l) + 4e^-
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