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

joongrg

5

Any answers u know comment down

Reply 1

james_cartwright

8

1st question which was multiple choice was the last one: calcium,magnesium,zinc,copper

Original post by joongrg

Any answers u know comment down

Reply 2

james_cartwright

8

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 :smile:

Original post by joongrg

Any answers u know comment down

Reply 3

Dividingjem2

8

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

Reply 4

james_cartwright

8

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 :smile:

Original post by joongrg

Any answers u know comment down

Reply 5

ZainKhan14

5

What did you guys get for the bond energy question(the one involving the double bonds) and Avagadros constant calculation?

Reply 6

joongrg

OP

5

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

interesting test

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

Reply 9

Raja12

16

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?

Reply 10

ZainKhan14

5

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

Reply 11

lolxddd123

8

titration 0.6 and 66 something

Reply 12

lilyrose270

12

- 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?

(edited 4 years ago)

Reply 13

moley_joe

3

Yes lads it was a crazy test

Reply 14

19lihs1

9

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?

Reply 15

lilyrose270

12

no aha my bad. ah i don’t think i can change the title…

Original post by 19lihs1

is this edexcel?

(edited 4 years ago)

Reply 16

ZainKhan14

5

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?