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CHEMISTRY - HELP Gcse
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TrishaChou1
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#1
b) Complete the sentence by putting a cross ( ) in the box next to your answer.
The reaction for the extraction of aluminium from its ore involves
(1)
A heating with carbon
B thermal decomposition
C reduction
D neutralisation
shouldnt A be the answer?
The reaction for the extraction of aluminium from its ore involves
(1)
A heating with carbon
B thermal decomposition
C reduction
D neutralisation
shouldnt A be the answer?
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epic08
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#2
I would of thought C (reduction)
Because in the reactivity series Aluminum is above Carbon so is displaced by electrolysis where Aluminum will be reduced at the cathode.
Al3+ +3e- --> Al
It's only metals below carbon in the reactivity series like zinc, iron, tin and lead that can be displaced by carbon.
Because in the reactivity series Aluminum is above Carbon so is displaced by electrolysis where Aluminum will be reduced at the cathode.
Al3+ +3e- --> Al
It's only metals below carbon in the reactivity series like zinc, iron, tin and lead that can be displaced by carbon.
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TrishaChou1
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#3
(Original post by epic08)
I would of thought C (reduction)
Because in the reactivity series Aluminum is above Carbon so is displaced by electrolysis where Aluminum will be reduced at the cathode.
Al3+ +3e- --> Al
It's only metals below carbon in the reactivity series like zinc, iron, tin and lead that can be displaced by carbon.
I would of thought C (reduction)
Because in the reactivity series Aluminum is above Carbon so is displaced by electrolysis where Aluminum will be reduced at the cathode.
Al3+ +3e- --> Al
It's only metals below carbon in the reactivity series like zinc, iron, tin and lead that can be displaced by carbon.
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epic08
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#4
Yes but when electrolysis is used aluminum is reduced in electrolysis so it will be reduction.
Have you done electrolysis yet?
Have you done electrolysis yet?
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TrishaChou1
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#5
(Original post by epic08)
Yes but when electrolysis is used aluminum is reduced in electrolysis so it will be reduction.
Have you done electrolysis yet?
Yes but when electrolysis is used aluminum is reduced in electrolysis so it will be reduction.
Have you done electrolysis yet?
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booklover1313
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#6
(Original post by TrishaChou1)
yess i have but i always get confused with reduction and oxidation
yess i have but i always get confused with reduction and oxidation
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tomedward
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#7
It should be reduction as the Al3+ is gaining electrons to become Al(s). Remember OIL RIG. Oxidation is loss of electrons, reduction is gain
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