闪卡自测
Define oxidation in terms of oxygen.
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闪卡 1
问题
Define oxidation in terms of oxygen.
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答案
Oxidation is any reaction in which a substance gains oxygen.
闪卡 2
问题
Define reduction in terms of oxygen.
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答案
Reduction is a reaction in which a substance loses oxygen.
闪卡 3
问题
What is oxidised in the following reaction in terms of oxygen? Zn + CuO → ZnO + Cu
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答案
In Zn + CuO → ZnO + Cu, the zinc / Zn is oxidised as it gains oxygen to become zinc oxide / ZnO.
闪卡 4
问题
Define the term redox reaction.
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答案
A redox reaction is when oxidation and reduction take place simultaneously.
闪卡 5
问题
What does the Roman numeral in iron(III) oxide tell us?
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答案
The roman numeral tells us the oxidation number of the iron.
闪卡 6
问题
What is the charge of copper in copper(II) chloride?
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答案
The copper has a 2+ charge in copper(II) chloride.
闪卡 7
问题
True or False? Iron(II) oxide has the formula Fe2O3.
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答案
False. Iron(II) oxide has the formula FeO. Fe2O3 is the formula for iron(III) oxide.
闪卡 8
问题
Which substance is oxidised in the following reaction? SnO2 + 2C → Sn + 2CO
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答案
In the reaction SnO2 + 2C → Sn + 2CO, carbon (C) is oxidised because it has gained oxygen.
闪卡 9
问题
What is the name of CoCl2?
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答案
The name of CoCl2 is cobalt(II) chloride.
闪卡 10
问题
Define oxidation in terms of electrons. (Extended Tier Only)
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答案
Oxidation is the loss of electrons.
闪卡 11
问题
Define reduction in terms of electrons. (Extended Tier Only)
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答案
Reduction is the gain of electrons.
闪卡 12
问题
What is oxidised in the following reaction? Mg + Cu2+ → Mg2+ + Cu (Extended Tier Only)
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答案
In Mg + Cu2+ → Mg2+ + Cu, magnesium (Mg) is oxidised as it loses electrons.
闪卡 13
问题
Define the term spectator ions. (Extended Tier Only)
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答案
Spectator ions are ions that appear unchanged on both sides of a chemical equation and do not participate in the reaction.
闪卡 14
问题
Define the term oxidising agent in terms of electrons. (Extended Tier Only)
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答案
In terms of electrons, an oxidising agent accepts electrons. An oxidising agent is reduced.
闪卡 15
问题
What is the oxidising agent in the following reaction? Cu + 2Ag+ → Cu2+ + 2Ag (Extended Tier Only)
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答案
The oxidising agent in the following reaction is Ag+ as it has been reduced / gained electrons. Cu + 2Ag+ → Cu2+ + 2Ag
闪卡 16
问题
Which species is oxidised in the following reaction? Fe + Cu2+ → Fe2+ + Cu (Extended Tier Only)
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答案
In the reaction Fe + Cu2+ → Fe2+ + Cu, iron (Fe) is oxidised as it loses electrons to become a positive ion.
闪卡 17
问题
True or False? In oxidation, the oxidation number of an element decreases. (Extended Tier Only)
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答案
False. In oxidation, the oxidation number of an element increases.
闪卡 18
问题
True or False? The sum of oxidation numbers in a compound is always zero. (Extended Tier Only)
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答案
True. The sum of oxidation numbers in a compound is always zero.
闪卡 19
问题
What is the oxidation number of N in NO2? (Extended Tier Only)
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答案
The oxidation number of N in NO2 is +4.