闪卡自测
What is an electrochemical cell?
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闪卡 1
问题
What is an electrochemical cell?
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答案
An electrochemical cell generates electrical energy from chemical reactions.
闪卡 2
问题
What is an electrode?
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答案
An electrode is a conductor through which electric current enters or leaves a medium.
闪卡 3
问题
What is an electrolyte?
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答案
An electrolyte is a substance that dissociates into ions and conducts electricity when molten or dissolved in a solvent.
闪卡 4
问题
True or False? The electrolyte used in a simple cell does not affect the voltage produced.
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答案
False. The electrolyte used also affects the voltage as different ions react with the electrodes in different ways.
闪卡 5
问题
True or False? The more reactive metal in a simple cell forms the positive electrode.
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答案
False. The more reactive metal forms the negative electrode as it readily releases electrons.
闪卡 6
问题
What happens when one of the reactants in a simple cell is used up?
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答案
Cells only produce a voltage until one of the reactants is used up.
闪卡 7
问题
What is labelled X?
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答案
X is the the voltmeter.
闪卡 8
问题
True or False? Electrons flow towards the more positive electrode in an electrochemical cell.
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答案
True. Electrons flow to the more positive electrode in an electrochemical cell.
闪卡 9
问题
What is a fuel cell?
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答案
A fuel cell is an electrochemical cell in which a fuel donates electrons at one electrode and oxygen gains electrons at the other electrode.
闪卡 10
问题
What are the products of a hydrogen-oxygen fuel cell?
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答案
A hydrogen-oxygen fuel cell produces water and energy.
闪卡 11
问题
Which direction do the electrons flow in a fuel cell?
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答案
The electrons flow from anode to cathode.
闪卡 12
问题
True or False? Hydrogen is pumped into the anode compartment.
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答案
True. Hydrogen is pumped into the anode compartment pf the fuel cell.
闪卡 13
问题
Where is air containing oxygen pumped into a fuel cell?
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答案
The air containing oxygen is pumped into the cathode compartment.
闪卡 14
问题
What is the symbol equation for the reaction between hydrogen and oxygen to form water?
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答案
The symbol equation for the reaction between hydrogen and oxygen to form water is: 2H2 + O2 → 2H2O
闪卡 15
问题
True or False? Using fuel cells in cars reduces noise pollution.
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答案
True. Using fuel cells in cars reduces noise pollution.
闪卡 16
问题
State two disadvantages of using fuel cells.
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答案
Two disadvantages could be from the following:
闪卡 17
问题
State two advantages of using fuel cells.
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答案
Two advantages could be from the following: