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OCR GCSE Chemistry Gateway A 9-1 UNOFFICIAL MARK SCHEME

Answers?
Answers for bond enthalpy question?
Answer for final mole question?
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
Reply 4
Avatar for Dinu1004
Dinu1004
9
Original post by Gcse12345678
Answers for bond enthalpy question?

I got -409
Reply 5
Avatar for Dinu1004
Dinu1004
9
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
For the chromatograohy question is it substance divided by solvent
Original post by Gcse12345678
Answers for bond enthalpy question?


-409
Original post by Gcse12345678
Answer for final mole question?

0.10
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
What about the half equation for chlorine?
okay thats good
Original post by Smartly superior
I also said that potassium hydroxide would be left, and wrote the half equations for each
(edited 4 years ago)
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?
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?
nope, i completely forgot
Original post by Gcse12345678
did you do the half equations?
:frown:same
Original post by olkapippin
nope, i completely forgot

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