GCSE AQA Combined Science Chemistry Paper 1 (Higher) 2019 - Unofficial Mark Scheme Watch

joongrg
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james_cartwright
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1st question which was multiple choice was the last one: calcium,magnesium,zinc,copper
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james_cartwright
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Also the last question 6 marker:
Sodium chloride is a ionic structure. Giant ionic lattice. Involving the transferring of electrons. Sodium loses an electron to become positively charged. Chlorine gains one electron to become negatively charged. Na+ and Cl2-. Whereas hydrogen chloride is a covalent structure. Involving the sharing of electrons. It is a simple covalent structure. Hydrogen shares electrons to complete outer shell with chlorine. They both remain negatively charged. Sodium chloride as strong forces of attraction whereas hydrogen chloride was weak forces of attraction.

If there are any errors in my answer please reply
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Dividingjem2
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Yep I got that least I got 1 mark😂
(Original post by james_cartwright)
1st question which was multiple choice was the last one: calcium,magnesium,zinc,copper
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james_cartwright
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Also the 6 marker on the required practical was kind of piss easy as you use a beaker and add different masses each time to a new beaker and control the water temperature at 25 degrees. Using a thermometer to calculate the change in temperature this shows how the effect of different masses changes temperature
(Original post by joongrg)
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ZainKhan14
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What did you guys get for the bond energy question(the one involving the double bonds) and Avagadros constant calculation?
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joongrg
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(Original post by ZainKhan14)
What did you guys get for the bond energy question(the one involving the double bonds) and Avagadros constant calculation?
Bond was -220 if I remembered correctly
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Godsuya
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interesting test
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I.T123
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(Original post by ZainKhan14)
What did you guys get for the bond energy question(the one involving the double bonds) and Avagadros constant calculation?
BS is what I got
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Raja12
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The bond energy one was -200 or somethign near that
(Original post by ZainKhan14)
What did you guys get for the bond energy question(the one involving the double bonds) and Avagadros constant calculation?
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ZainKhan14
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I GOT THAT. The reason why I was unsure about the answer is because decomposition is endothermic and isn't bond energies for endothermic a positive answer?
(Original post by joongrg)
Bond was -220 if I remembered correctly
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lolxddd123
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titration 0.6 and 66 something
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lilyrose270
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- i got 0.62 for the first part of the 6 marker at the end
- 941.2 for something lol
- the one about why sodium chloride won’t produce a metal, i wrote cuz there are H+ ions so they will get discharged, but i forgot wether it was aqueous or not
- the titration 6 marker wasn’t that bad, but was the last step to calculate the concentration by doing c=mv?
Last edited by lilyrose270; 6 days ago
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moley_joe
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Yes lads it was a crazy test
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19lihs1
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is this edexcel?
(Original post by lilyrose270)
- i got 0.62 for the first part of the 6 marker at the end
- 941.2 for something lol
- the one about why sodium chloride won’t produce a metal, i wrote cuz there are H+ ions so they will get discharged, but i forgot wether it was aqueous or not
- the titration 6 marker wasn’t that bad, but was the last step to calculate the concentration by doing c=mv?
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ZainKhan14
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Can someone else confirm -220 is a correct answer?
(Original post by ZainKhan14)
I GOT THAT. The reason why I was unsure about the answer is because decomposition is endothermic and isn't bond energies for endothermic a positive answer?
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lilyrose270
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no aha my bad. ah i don’t think i can change the title…
(Original post by 19lihs1)
is this edexcel?
Last edited by lilyrose270; 6 days ago
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Lucas6485
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11 for the one about volume of alkali or acid I can’t remember which one
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Starr0118
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Yeh I got -220 eswell
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19lihs1
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omg okay its okay ahah you scared me cos I didnt get any of those answers
(Original post by lilyrose270)
no aha my bad. ah i don’t think i can change the title…
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