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