IGCSE Edexcel Chemistry Paper 1
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Original post by Ariana1880
Was the caffeine one simple molecular? So for calcium bromide talk abt electrostatic force of attraction like ionic stuff then was caffeine just simple molecular and weak intermolecular forces
yeah i talked about the structures of both
Original post by harry_maguire4
1.
Fill in the table: lithium conducts electricity, lithium forms a basic oxide, bromine is the liquid at room temperature, diamond has a giant covalent structure, ethene forms polymers + test for chlorine; damp blu litmus paper turns red then bleaches
2.
Magnesium atom: group 2 and period 3, calculating the number of electrons in one mole; 7.2 x 10^24, compound formed with fluorine, calculating Ar; 24.3
3.
Metals and their reactions with water and hydrochloric acid
4.
Caffeine question; number of elements, Ar; 194, equation to form nitric acid, harmful effects of acid rain
5.
Chromatography
6.
Marbles in hydrochloric acid; cotton wool, why the mass decreases, describing graph, explain the effect of using smaller marble chips
7.
Nitrogen and its compound; nitrogen dot and cross, Ammonium carbonate
8.
C4H8 isomers
9.
Hydrated potassium aluminium sulphate
10.
Enthalpy change question
Original post by ceoiku
I got x = 14 y = 10 z = 9
Original post by User320
Could you get a mark for water as the liquid at room temp
no because it asked for an element
Original post by sandyjones
no because it asked for an element
**** I didn’t read the question I just say liquid at room temp and write water
Original post by yoowan
How did y'all find the paper?
I felt that the paper was a little harder than past papers that i've done before 😬
I felt that the paper was a little harder than past papers that i've done before 😬
Really? i thought it was easier
Original post by yoowan
How did y'all find the paper?
I felt that the paper was a little harder than past papers that i've done before 😬
I felt that the paper was a little harder than past papers that i've done before 😬
i thought it easier than all the past papers i was doing i didnt think it was too bad
Original post by expjmyfhj
What did you guys get for number of electrons question that you have to answer in standard form
Original post by banal-pool
yeah i got x=12 aswell for the anhydrous one
x =12 for me too
Original post by GotNoWifi
7.2*10^24
Man I multiplied by 0.0005, didn't think it would be this simple
Original post by Ariana1880
Yeah I realised I didn't add the protons and neutrons ðŸ˜
u could have just checked by seeing what was magnesium's relative atomic mass
oh yh how did everyone do the graph drawing curve of rate of reaction when acid concentration decreased?
i put the curve with a steeper gradient as slower rate of reaction but I think the same amount of product is formed so the curve reached the same level (as in levelled off at same level, just afterwards) if that makes sense lol
some of my friends drew same graph curve but half the size but I think that's wrong?
i put the curve with a steeper gradient as slower rate of reaction but I think the same amount of product is formed so the curve reached the same level (as in levelled off at same level, just afterwards) if that makes sense lol
some of my friends drew same graph curve but half the size but I think that's wrong?
(edited 4 months ago)
did someone leak the paper for this - there's a rumour some people had the mark schemes bought online
Original post by asbingh
The last question was very similar to 2021 paper in june
there were quite a few questions that looked similar to the june 2021 one or maybe that's just because i did it the night before
Original post by ymoose
oh yh how did everyone do the graph drawing curve of rate of reaction when acid concentration decreased?
i put the curve with a steeper gradient as slower rate of reaction but I think the same amount of product is formed so the curve reached the same level (as in levelled off at same level, just afterwards) if that makes sense lol
some of my friends drew same graph curve but half the size but I think that's wrong?
i put the curve with a steeper gradient as slower rate of reaction but I think the same amount of product is formed so the curve reached the same level (as in levelled off at same level, just afterwards) if that makes sense lol
some of my friends drew same graph curve but half the size but I think that's wrong?
Original post by ceoiku
I got x = 14 y = 10 z = 9
I got 13.5 would I still get the mark?
Original post by GotNoWifi
7.2*10^24
sameee
Original post by yoowan
How did y'all find the paper?
I felt that the paper was a little harder than past papers that i've done before 😬
I felt that the paper was a little harder than past papers that i've done before 😬
Yeah I couldn't agree more. All my friends said it was super easy but it was a bit harder than previous ones. Anyway I should still get above 85% as before I used to get like 95%; I just hope I was accurate
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