January Edexcel Chemistry IAL Unit 1 2016 (Thread)

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Oh so thats how its works.. last may one of my friend got 120ums ...and i thought he got the full raw mark...btw does it goes the same way for maths c12?? And what do you guys predict for the A to be this term..?

Yep, it works similarly for C12. Although, there's normally less scaling for maths units.

Reply 61

SaadKaleem

Original post by elhm18

No, last May, as in in IAL May 2015 unit 1, full UMS was 70/80 in raw actually. And 68/80 for GCE.

For IAL, last summer. 120/120 at 80 raw marks.

(edited 8 years ago)

Reply 62

elhm18

Original post by SaadKaleem

For IAL, last summer. 120/120 at 80 raw marks.

Oh my god, I'm so sorry. I'd been looking at the one for biology the entire time... Quite stupid of me. I was really confused when you said that for that reason. Removing my previous comment so people don't get confused. Thank you!

Reply 63

Kamran Fazal

Original post by Tayyabshabbirtsr

I thought i was prepared so well i didnt revise alot before the exam.Now I may aswell be loosing around 8-12 marks excluding anything which i thought was right but wasn't. How high do u guys think the grade boundary can be considering that july boundaries r always high amd january r pretty low as compared?

70 out of 80 i think

Reply 64

mutantninja978

Original post by SaadKaleem

The % yield, i got was 73.5% anyone else?

Yea i rmemeber something 70ish maybe but i remember it was 70 something. Ok lol im worred about hess law i was getting my answer as -3009 thing actually it was i think exactly the same answer as the databook valu written on the other page whuch worried me.Also what was the answeer for the heat loss question? I wrote incomplete combustion and evaporation of fuel before burning. Is it correct? Oh yea nd the % yielf was 6.15/8. Something right? Cos i rmemeber 73 or 72% anywho

(edited 8 years ago)

Reply 65

Adorable98

Original post by mutantninja978

Also what was the answeer for the heat loss question? I wrote incomplete combustion and evaporation of fuel before burning. Is it correct?

Wrote the exact same thing and I guess it's true!!

Reply 66

Adorable98

How many alkene bonds were there? last multiple choice question!!

Reply 67

SaadKaleem

Original post by Adorable98

How many alkene bonds were there? last multiple choice question!!

Four double bonds were broken.

Reply 68

Adorable98

Original post by SaadKaleem

Four double bonds were broken.

Got that one wrong then!

Reply 69

AhmedSiddiqui

Original post by SaadKaleem

Four double bonds were broken.

Lol yup wrote the same answer. I didnt think about it that much I just went for a hail mary.

Reply 70

Adorable98

What was the reason for not being able to compare the data values or experimental values of the isomers?!

Reply 71

SaadKaleem

Can anyone confirm about the MCQ of isotopes O16, O17, O18

How many peaks would be seen for O2+ mass spectrum?

Reply 72

mutantninja978

Original post by Adorable98

What was the reason for not being able to compare the data values or experimental values of the isomers?!

I wrote same molecular formula so same mass burnt so same enthalpy change (altho i think only RMM is correct i dont feel like my firther explanation is correcr u kno. Is my answer correct tho?) also for the O2+ i chose 6. I think its correct. Lol well off topic but i also gave IAL biology and physics. I thought the phy paper was comparitively easy but then my answers dont match my friends and im worried . Tbh the papers this january were easier than expected (expected and than normal) yet someone gave me a good reason as to why this may jave happened: its the last jan exam ever so there mightve been a reason to make it easy (end the jan exams on a good note eh? Lol) honestly the donle bond question understood in the end but i did it woop AH.

Reply 73

Adorable98

Original post by mutantninja978

Wrote the same thing, it was for a mark after all! :biggrin:

I also did bio 2day not physics!

it was -3030.5kj/mol

I wrote 1,2-propanediol for the reaction with KMnO4 it's not IUPAC but iit is acceptable on a place I've seen? They didnt specifically ask IUPAC so is it ok?? Also u guys r scaring me about hess law lol 😭😭 and guys is it ok if for the mechanism i showed a Br- ion with its 4 lone pairs?

Reply 76

SaadKaleem

Original post by mutantninja978

I just wrote, the displayed formula of the product, so idk. (You could either write formula or name)

The answer for hess law was -3030.5 kJ/mol.

In the mechanism, you had to show the dipoles in the 1st step, along with the lone pair in between of HBr for heterolytic fission.

2nd step, you had to show the lone pair on bromide ion and it attacking the carbocation.

(edited 8 years ago)

Reply 77

Electrify

Original post by SaadKaleem

I think I put butane-1,2-diol. It wasn't butane? :redface:

Also I forgot to put the lone pair between HBr but I put everything else.

Reply 78

SaadKaleem

Original post by Electrify

I think I put butane-1,2-diol. It wasn't butane? :redface:

Also I forgot to put the lone pair between HBr but I put everything else.

Don't remember if it was propane or butane,

anyway, there might be a possibility that, they won't penalize the lone pair between HBr, but the Br- lone pair was important.

Reply 79

Electrify

Original post by SaadKaleem

Don't remember if it was propane or butane,

anyway, there might be a possibility that, they won't penalize the lone pair between HBr, but the Br- lone pair was important.

Pretty sure I put the Br- lone pair. I hope it was butane, seriously don't want to get a B from an exam like this.

Do you remember the answer to this multiple-choice question: there were 3 compounds and a table of -ve values were given. I think they were copper sulphate, potassium something and potassium iodide.