Chemistry aftermath

microbiek

ive already left chemistry hardest test ive done so far!!! harder than physics

microbiek

ah no twas grand haha

carlowboy

Pffft....not possible. :P

microbiek

ah no it was actually grand fair enuf test

HungryJoey

Found it quite easy enough the paper its-self. My problem was lack of study, In saying that it was relatively easy.

Hj

carlowboy

I was reacting to your first post. So I should have done it instead of physics then?

theliam

Chemistry was great! did a bit of study last friday and some yesterday and this morning other than that nothing really since the mocks. i got lucky, titrations are always easy, and had ethanoic acid and heat of neutralisation prepared.

didnt much like Q4 though

microbiek

carlowboy wrote:

I was reacting to your first post. So I should have done it instead of physics then?

well for points yeah bt i prefer physics chemistry is sooooooo borin glad im finished!!!

toxick

actualy was a very fair paper, only thing i did not like was Q4, and Q10.. answered everything except 10. 4 had some easy bits and annoyance bits. but overall, good exam

alancork

delited!! had all 3 experiments well prepared...did 10 questions.... did ye get .125mol/l in ques 1, and 31g/l?

Thomas_S_Hunterson

alancork wrote:

delited!! had all 3 experiments well prepared...did 10 questions.... did ye get .125mol/l in ques 1, and 31g/l?

Yup they're both right

I thought it was very easy. Should be a very solid A1, did 10 questions.

nedward

Super paper I thought. Really easy. Experiments were exactly as predicted.
56280 kJ mol for the heat of reaction? Just remembered I forgot to put in the minus sign. Grrr!

Cipriana

Did anyone find the picture of the dead Russian dude a bit off putting? I thought it was really weird. Though the question itself was grand.

Thomas_S_Hunterson

nedward wrote:

Super paper I thought. Really easy. Experiments were exactly as predicted.
56280 kJ mol for the heat of reaction? Just remembered I forgot to put in the minus sign. Grrr!

Should just be -56.280 kJ

There's no need for a per-mole because it's heat of a specific reaction.

nedward

sean_keevey wrote:

Should just be -56.280 kJ

There's no need for a per-mole because it's heat of a specific reaction.

Dammit. Ah well, extra question anyway. Roll on August 15!

That Russian guy...yes...the way he looked at the camera as if pleading with you to do his question.

DtotheK

i thought it was fine. a few little guesses but i'm hoping for an A

Anyone notice they acked bout alcohol in a can of beer
trying hard to relate to the teens of today...

and in Q5b they ask "would you expect the hydrogen.....?Explain your answer."

It's six marks so i guess 2 or 3 is for your yes or no and the rest for your explanation, but surely everyone should get the first 2 marks (if that's the marking schemes) cause it is what you expect they ask, not for the answer... so if everyone knows and writes what they expect, surely they should get those marks... even if they're wrong.

Forgot the minus sign...

bryanw

I wasn't too happy with the exam... I thought some parts of it were difficult and a lot of my weaknesses came up. I suppose I can't be expecting an excellent grade. I'd say C1 tops. I'm a bit disappointed considering all the work I put in since the mocks.

Oh well... at least its all over for me now!!!

bebop!

It wasn't easy but it wasn't impossible either... dunno how ive done.

did anyone do the equilbriuim question?? The Thoery parts were nice but what did yas get for Kc??

DtotheK

got that x = one but forget the rest

Lucas10101

The experiments were quite easy will probably get 130/150. I thought Question 4 was sort of easy, question 5 was a little annoying but manageable, didn't touch question 6. Question 7 was sort of okay, Question 8 was Okay and 11 was okay.

Experiments 130 marks.
Question 4 = 45 Marks
Question 5 = 35 Marks
Question 7 = 40 Marks
Question 8 = 35 Marks
Question 11 = 40 Marks
******************
Approximate Total = 325/400 = 82%
Although I should have got an A1 found things in some questions too abstract and couldn't work around them although happy to get B1.

carlowboy

How many experiments are there in chemistry? They harder than physics?

lemansky

Couldn't have asked for a nicer end to the leaving it was a lovely exam.I got scared when I read some of the questions but then when I actually sat down to do them they were all easy.

I think all 7 of us in the centre,including the superintendent,laughed when we saw the picture that accompanied the polonium 210 question...

bebop!

lemansky wrote:

I think all 7 of us in the centre,including the superintendent,laughed when we saw the picture that accompanied the polonium 210 question...

Why did u all laugh at a picture of a dead man?

lemansky

bebop! wrote:

Why did u all laugh at a picture of a dead man?

Wasn't so much at him as the attempt on the part of the SEC to 'be topical' and show us how science touches us in the real world

bebop!

Ah im just messin wit ya,, i did think myself that it was a strange picture to use!!

Thomas_S_Hunterson

deek wrote:

Was there a mistake in the question on heats of neutralisation?

I was waiting for that question. No there wasn't insteadof giving you the specific heat capacity and the mass, they just gave you the product of these i.e. 4200*0.1 and you just had to multiply the figure they gaveee by the change in temperature to get the heat change.

Lucas10101

Carlow Boy, there's 28 Mandatory, 5 Electrochemistry, smaller experiments to be learned off as examples, so I would say you would need to know the 28 off heart and 12 or so as methods i.e Internediate Formation Theory experiment, 40 or so in all.

There not hard but you have to go over and over and over etc etc etc.

JC 2K3

That was such a relief after Physics.

Predictable and straight forward.

I'd say I'm looking at an A2 if not an A1(hopefully the Irish bonus will being me up).

What I wasn't sure of:
1(c) - was it KIO3? Or did you have to say KI and KIO3?

2(f) - What was the equation?
I wrote Na2CO3 + CH3COOH -> CH3COONa + CO2 + H2O but couldn't balance it....

3(g) - I wrote a Thermometor What was it?

5(b) - It said "diagrams", surely you only needed one?

bebop!

sean_keevey wrote:

I was waiting for that question. No there wasn't insteadof giving you the specific heat capacity and the mass, they just gave you the product of these i.e. 4200*0.1 and you just had to multiply the figure they gaveee by the change in temperature to get the heat change.

DOH! I worked out 0.1 myself and then multiplyed it...!!! GRRRRRRR

lemansky

bebop! wrote:

Ah im just messin wit ya,, i did think myself that it was a strange picture to use!!

Sorry my brain is too fried to pick up on anything beyond what I see on the screnn:D

I must admit that I was surprised to see it.You can bet that there will be people who will be calling up SEC to complain though!

Thomas_S_Hunterson

JC 2K3 wrote:

What I wasn't sure of:
1(c) - was it KIO3? Or did you have to say KI and KIO3?

It's just potassium iodide, is it not.