[Finalshowtime]

Heh...its to each schools to decide wether or not they apply IB rules.
But if an examinator shows up, all the class gets 0 !

[Agneisse]

(Original post by Finalshowtime)
Well in the syllabus it is clear: NO GDC allowed.

Hmm, can you tell me which section this is in? I just went and checked and it just said "a calculator is required" under P2 and P3? (there's always the distinct possibility I'm just blind, too)

[radicality]

(Original post by Finalshowtime)
But if you look at the specimen for paper 1, some questions are not doable without a calculator.

I just went through it, and there is nothing in it requiring a calculator.... Go revise some non-calc arithmetic....

(Original post by Agneisse)
Hmm, can you tell me which section this is in? I just went and checked and it just said "a calculator is required" under P2 and P3? (there's always the distinct possibility I'm just blind, too)

I can't find it either. Just did a Ctrl-F for GDC and nothing came up in the newest syllabus, so I'm calling this BS...

[EmUIbA]

I think that's not true. Even in the Hanbook of Procedures it is suggested that a GDC is recommended for Chemistry exams.

[moneyfaery]

(Original post by Antrumf)
Hold on, now you're freaking me out. You're saying we're not allowed a GDC for papers 2&3? Only crappy calculators? But it's the only calculator I've got..... surely they're not forbidden?

Apparently, they're not allowed... or at least, my school doesn't allow it. Talk to your teacher. It might just be the case that they haven't collected it and cleared apps/progs/RAM. I dunno.

For the record: P1 is NON-calc, P2 and P3 is with calc. P1 questions are always doable without a calc... I dare someone to prove it otherwise.

[moneyfaery]

Calculators are not allowed on paper 1.
On paper 2 and paper 3, a calculator with the following minimum
functionalities is required (a GDC is recommended):

Grr, GDCs ARE allowed. Why can't I use mine then?!
It's already cleared from the math exam....

[Finalshowtime]

(Original post by moneyfaery)
Apparently, they're not allowed... or at least, my school doesn't allow it. Talk to your teacher. It might just be the case that they haven't collected it and cleared apps/progs/RAM. I dunno.

For the record: P1 is NON-calc, P2 and P3 is with calc. P1 questions are always doable without a calc... I dare someone to prove it otherwise.

Specimen question, #1

How many hydrogen atoms are in one mole of ethanol, C2H5OH?

A. 1.00 x10^23
B. 3.61 x10^24
C.5.00
D.6.00

Like its doable but still...

[Erfan777]

(Original post by Finalshowtime)
Specimen question, #1

How many hydrogen atoms are in one mole of ethanol, C2H5OH?

A. 1.00 x10^23
B. 3.61 x10^24
C.5.00
D.6.00

Like its doable but still...

exactly, I dare anyone wasting like 5 minutes trying to multiply 6 with 6.02 x 10^23

[Student#1]

(Original post by Finalshowtime)
Specimen question, #1

How many hydrogen atoms are in one mole of ethanol, C2H5OH?

A. 1.00 x10^23
B. 3.61 x10^24
C.5.00
D.6.00

Like its doable but still...

P1 is okay without calc..

Calc in p2, is just for our "mental support" Anything can be done without calc

[Student#1]

(Original post by Erfan777)
exactly, I dare anyone wasting like 5 minutes trying to multiply 6 with 6.02 x 10^23

I am pretty sure there are some.. some even writing out the whole 21 zeros :P But they are in rare numbers

[CATIII]

(Original post by Finalshowtime)
Specimen question, #1

How many hydrogen atoms are in one mole of ethanol, C2H5OH?

A. 1.00 x10^23
B. 3.61 x10^24
C.5.00
D.6.00

Like its doable but still...

These questions are so simple though, why would you need a calculator to do it? It's definitely not C and D. There are more hydrogen atoms than molecules of ethanol, so it must be greater than 6.02x10^23, thus it must be B.

But I get your point, why do they want to test our mathematical reasoning if the subject is called Chemistry?

[Student#1]

(Original post by CATIII)
These questions are so simple though, why would you need a calculator to do it? It's definitely not C and D. There are more hydrogen atoms than molecules of ethanol, so it must be greater than 6.02x10^23, thus it must be B.

But I get your point, why do they want to test our mathematical reasoning if the subject is called Chemistry?

Cause option A is less than 6.022*10^23..

so it is to see if we know the avagadro's constant ....

[~Viola~]

(Original post by CATIII)
These questions are so simple though, why would you need a calculator to do it? It's definitely not C and D. There are more hydrogen atoms than molecules of ethanol, so it must be greater than 6.02x10^23, thus it must be B.

But I get your point, why do they want to test our mathematical reasoning if the subject is called Chemistry?

So the answer is definitely B?

Also, please can someone explian the difference between Sn1 and Sn2. I know Sn2 has one step and vice versa, but why?

[~Viola~]

So if I got 41/48 in the internal assessment which is worth 24% overall, that means that I've already got 20.5% of my overall grade, if 50% is a 4 then I need 30% in papers 1 + 2 + 3? Is this right, I need to get 30% to get a level 4 overall? I'm happy if this is correct.

[Jess.MF]

(Original post by ~Viola~)
So the answer is definitely B?

Also, please can someone explian the difference between Sn1 and Sn2. I know Sn2 has one step and vice versa, but why?

Sn2 basically involves the leaving group AND the new group attached to the central C at the same time for a brief moment..
Sn1 involves the leaving group detaching first, and then when it is gone, the next group is attached..
Basically in Sn1 the first group has to detach because it happens in some secondary and all tertiary carbons, as there is not enough space for 5 groups around it- too many bulky groups.. but in primary Cs there is enough space, so Sn2..

[moneyfaery]

(Original post by Finalshowtime)
Specimen question, #1

How many hydrogen atoms are in one mole of ethanol, C2H5OH?

A. 1.00 x10^23
B. 3.61 x10^24
C.5.00
D.6.00

Like its doable but still...

6 x 6 x 10^23 = 36 x 10^23 = 3.6 x 10^24

Or you could just eliminate A, C, and D. Honestly, it takes 10 seconds if you know your stuff. What's tricky is reading properly and differentiating between 'mole' and 'molecule'.

Pick a better question to prove me wrong, haha.

[Erfan777]

(Original post by ~Viola~)
So the answer is definitely B?

Also, please can someone explian the difference between Sn1 and Sn2. I know Sn2 has one step and vice versa, but why?

In Sn2 there is a transition state where the formation of OH ion to Carbon occurs simultaniously with the breaking of halogen bond from carbon. That is the one step mechanism.

unlike Sn1 which first produce an intermediate electron deficient carbocation at first, which is a slow process btw and then it reacts rapidly with OH ion to form the final product (fast reaction). So overall its more than 1 process.

[Dan_G]

(Original post by Finalshowtime)
But if an examinator shows up, all the class gets 0 !

Those pesky examinators

[~Viola~]

What are the benefits of using a GDC over my normal calc?
Or is this just everyone falling in love with their special calculators leaving the good ol' traditional ones at the wayside.
Seriously though, how will they help? I think I'm going to take both, just as a securtiy blanket.

[moneyfaery]

(Original post by ~Viola~)
What are the benefits of using a GDC over my normal calc?
Or is this just everyone falling in love with their special calculators leaving the good ol' traditional ones at the wayside.
Seriously though, how will they help? I think I'm going to take both, just as a securtiy blanket.

It's prettier and I like it. That's it, really.