OCR GCSE Chemistry Gateway A 9-1 UNOFFICIAL MARK SCHEME Watch

Gcse12345678
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Answers?
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Gcse12345678
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Answers for bond enthalpy question?
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Gcse12345678
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Answer for final mole question?
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Gcse12345678
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What did you guys write for the 6 marker on electrolysis?
I wrote:
- At the anode bromine formed
-At the cathode hydrogen is formed
-Hydrogen is formed as it is less reactive than potassium

Idk if its right
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Dinu1004
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(Original post by Gcse12345678)
Answers for bond enthalpy question?
I got -409
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Dinu1004
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(Original post by Gcse12345678)
What did you guys write for the 6 marker on electrolysis?
I wrote:
- At the anode bromine formed
-At the cathode hydrogen is formed
-Hydrogen is formed as it is less reactive than potassium

Idk if its right
Yh its right. And bromine was a halogen therefore its produced.
The solution is aqeuos so it contains H+ and OH- ions
Just waffle every step
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Gcse12345678
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For the chromatograohy question is it substance divided by solvent
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Smartly superior
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(Original post by Gcse12345678)
Answers for bond enthalpy question?
-409
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Smartly superior
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(Original post by Gcse12345678)
Answer for final mole question?
0.10
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Smartly superior
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I also said that potassium hydroxide would be left, and wrote the half equations for each
(Original post by Gcse12345678)
What did you guys write for the 6 marker on electrolysis?
I wrote:
- At the anode bromine formed
-At the cathode hydrogen is formed
-Hydrogen is formed as it is less reactive than potassium

Idk if its right
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Gcse12345678
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#11
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What about the half equation for chlorine?
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Gcse12345678
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okay thats good
(Original post by Smartly superior)
I also said that potassium hydroxide would be left, and wrote the half equations for each
Last edited by Gcse12345678; 4 days ago
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olkapippin
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(Original post by Gcse12345678)
What did you guys write for the 6 marker on electrolysis?
I wrote:
- At the anode bromine formed
-At the cathode hydrogen is formed
-Hydrogen is formed as it is less reactive than potassium

Idk if its right
its correct but for cathode i put hydrogen is formed because potassium is more reactive than hydrogen. Basically saying the same thing but is it worded wrong?
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Gcse12345678
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did you do the half equations?
(Original post by olkapippin)
its correct but for cathode i put hydrogen is formed because potassium is more reactive than hydrogen. Basically saying the same thing but is it worded wrong?
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olkapippin
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nope, i completely forgot
(Original post by Gcse12345678)
did you do the half equations?
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Gcse12345678
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same
(Original post by olkapippin)
nope, i completely forgot
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