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# Edexcel IAL Chemistry Unit 01 - 26th of May, 2017 watch

• View Poll Results: How did you find this exam?
Amazing!
13
26.53%
Good
14
28.57%
Okay
16
32.65%
2
4.08%
HORRIBLE PAPER!!
4
8.16%

1. Exam was easy I knew almost everything thank God, hopefully I wrote all that was needed to get as high as possible.
2. Here's what I got in some of the MCQs, as much as i could remember
ppm is 2.7
no of ions is 3.6X10^24
Li3PO4
Cr2O3
Max volume is 0.5 dm^3
E(I-I) is 112
Order of increasing MP: Na, Mg, Al
Showing E-Z: but-2-ene

And for the question about Lattice energy, I got negative two thousand something kJ/mol
and the enthalpy change of reaction for decomposition of hydrogencarbonate: +100 KJ/mol

Anyone remember the others and can check with me?
3. (Original post by annbee)
Here's what I got in some of the MCQs, as much as i could remember
ppm is 2.7
no of ions is 3.6X10^24
Li3PO4
Cr2O3
Max volume is 0.5 dm^3
E(I-I) is 112
Order of increasing MP: Na, Mg, Al
Showing E-Z: but-2-ene

And for the question about Lattice energy, I got negative two thousand something kJ/mol
and the enthalpy change of reaction for decomposition of hydrogencarbonate: +100 KJ/mol

Anyone remember the others and can check with me?
Did the paper come out just like you expected?
Was it easy?
4. (Original post by annbee)
Here's what I got in some of the MCQs, as much as i could remember
ppm is 2.7
no of ions is 3.6X10^24
Li3PO4
Cr2O3
Max volume is 0.5 dm^3
E(I-I) is 112
Order of increasing MP: Na, Mg, Al
Showing E-Z: but-2-ene

And for the question about Lattice energy, I got negative two thousand something kJ/mol
and the enthalpy change of reaction for decomposition of hydrogencarbonate: +100 KJ/mol

Anyone remember the others and can check with me?
i got them all the same as you in the MCQ except the first one 2.7x10^3. Maybe i did something wrong in calculation as i was doing it fast.
i got a different value for the decomposition it was 3 something because i used the limiting reactant.
what did you get for the question asking which one has the same molecular and chemical formula?
and for the one asking to identify X in the spectrum?
how were the arrows ih Hess cycle?
and what about the ionisation energy? it was the second value only not adding the first.
what are the other physical characteristics in the ionic and metallic bonding question?
5. (Original post by Reshyna)
How was yours?
Was the paper just like how you expected?
The paper was good.. But I thought that it was too long.
6. (Original post by mr.holmes)
i got them all the same as you in the MCQ except the first one 2.7x10^3. Maybe i did something wrong in calculation as i was doing it fast.
i got a different value for the decomposition it was 3 something because i used the limiting reactant.
what did you get for the question asking which one has the same molecular and chemical formula?
and for the one asking to identify X in the spectrum?
how were the arrows ih Hess cycle?
and what about the ionisation energy? it was the second value only not adding the first.
what are the other physical characteristics in the ionic and metallic bonding question?
You have to add both 1st and 2nd ionization energies to get delta H 2
7. (Original post by mandax_25)
You have to add both 1st and 2nd ionization energies to get delta H 2
are you sure? because the second one if after the removal of the first so?
how many marks would i lose?
8. (Original post by mr.holmes)
i got them all the same as you in the MCQ except the first one 2.7x10^3. Maybe i did something wrong in calculation as i was doing it fast.
i got a different value for the decomposition it was 3 something because i used the limiting reactant.
what did you get for the question asking which one has the same molecular and chemical formula?
and for the one asking to identify X in the spectrum?
how were the arrows ih Hess cycle?
and what about the ionisation energy? it was the second value only not adding the first.
what are the other physical characteristics in the ionic and metallic bonding question?
I think you're asking about the MCQ: which has a different molecular and empirical formula. Here I chose cyclopentane. For the other molecules, they got the same molecular and empirical formula.
and identity of X I wrote iron, for I got RAM of 55.9
Both arrows of the hess cycle goes down to form 2NaCl, 2H2O and 2CO2
For IE, I think we need to add up the 1st and the 2nd ionization energy of Mg
Physical characteristic I wrote electrical conductivity
9. (Original post by annbee)
I think you're asking about the MCQ: which has a different molecular and empirical formula. Here I chose cyclopentane. For the other molecules, they got the same molecular and empirical formula.
and identity of X I wrote iron, for I got RAM of 55.9
Both arrows of the hess cycle goes down to form 2NaCl, 2H2O and 2CO2
For IE, I think we need to add up the 1st and the 2nd ionization energy of Mg
Physical characteristic I wrote electrical conductivity
ok thanks
i did not add the ionisation energies so am i going to lose all the marks(3marks)
as we use the calculated H2 in the second part.
what was the reason for using a large beaker?
and how did you find HCl in excess?
10. (Original post by annbee)
Here's what I got in some of the MCQs, as much as i could remember
ppm is 2.7
no of ions is 3.6X10^24
Li3PO4
Cr2O3
Max volume is 0.5 dm^3
E(I-I) is 112
Order of increasing MP: Na, Mg, Al
Showing E-Z: but-2-ene

And for the question about Lattice energy, I got negative two thousand something kJ/mol
and the enthalpy change of reaction for decomposition of hydrogencarbonate: +100 KJ/mol

Anyone remember the others and can check with me?
I got E(I-I) = 151
11. (Original post by Shamin06)
I got E(I-I) = 151
Yeh same
12. (Original post by mr.holmes)
ok thanks
i did not add the ionisation energies so am i going to lose all the marks(3marks)
as we use the calculated H2 in the second part.
what was the reason for using a large beaker?
and how did you find HCl in excess?
I think i have calculated the number of moles of HCl, and it's 0.25 mol, while that of 8 g of hydrogencarbonate is 0.0952 mol. So HCl is excess.
13. (Original post by annbee)
I think i have calculated the number of moles of HCl, and it's 0.25 mol, while that of 8 g of hydrogencarbonate is 0.0952 mol. So HCl is excess.
okay i did the same
what mole value did you use for the second part asking you to calculate the enthaly change per mole?
14. How did you guys find the IAL Unit 1 Chemistry exam??

Which questions were difficult??
15. (Original post by Shamin06)
I got E(I-I) = 151
Mee too
16. (Original post by annbee)
I think you're asking about the MCQ: which has a different molecular and empirical formula. Here I chose cyclopentane. For the other molecules, they got the same molecular and empirical formula.
and identity of X I wrote iron, for I got RAM of 55.9
Both arrows of the hess cycle goes down to form 2NaCl, 2H2O and 2CO2
For IE, I think we need to add up the 1st and the 2nd ionization energy of Mg
Physical characteristic I wrote electrical conductivity
Exactly what i did
17. What do you think the grade boundaries will be guys?
18. (Original post by Crystal_M)
Exactly what i did
what did you find the enthalpy change per mol?
19. (Original post by mr.holmes)
okay i did the same
what mole value did you use for the second part asking you to calculate the enthaly change per mole?
positive 30 something kJ/mol
20. Hey guys what was the Hess law answer I got 100.3

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