AS and A2 chemistry practical exams 2013 CCEA

Hi,

I couldnt find anything on here about the CCEA practical papers for AS and A2. Just curious as to what people think may come up in these papers. (eg; which titration, which observations/deductions etc) I want to do really well in these.

Reply 1

krisachick

OP

Anyone?

It is now exactly 2 weeks until the A2 practical exam. My teacher has not given us any tips or hints on what it is likely to come up. Feeling a bit worried as I want to do really well in the practical exams, so as I can afford to drop a few marks in the written exams.

Hopefully I am not breaking any rules by posting this, I am not used to studentroom, so apologies if I am! :smile:

Reply 2

BLUERUN

Hey, how'd you find the chemistry practical? I screwed up in the identification tests : /

Reply 3

krisachick

OP

Hey, sorry to hear that :frown:

maybe you didn't do as bad as you think?

I think it went okay, but I know I've lost silly marks. I assume now that the practical and alternative practical are over we are allowed to discuss it. I went back and forth between Nickel and Chromium in my head I don't know how many times! In the end I went for Chromium, I couldn't remember the confirmatory test for it at the time, so the fact that it dissolved in NaOH meant nothing to me as I couldn't remember which was soluble and which was insoluble!

Are you doing the AS practical on Monday? I have a decent mark in it, but resitting anyway to try to pull as many marks from anywhere that I can. How are you feeling about the A2 written exams? I'm not looking forward to module four, but I hope module five will be decent.

Reply 4

ilovescience123

Hi

I have the AS practical tomorrow, it is my first attempt.

In preparation I am learning the following:

-Identification of organic liquid
-Qualitative Analysis
-Preparation of halogenoalkane
-Removing water of crystallisation
-Iodoform preparation
-Enthalpy of combustion
-Enthalpy of neutralistation
-Reacting elements with water
-Reacting elements with steam
-Titrations
-Calculations

is this enough/am I missing anything? How are you preparing?

Reply 5

louise14

1

doing past papers to prepare, revising calculations would probs be a good idea

Reply 6

ilovescience123

Original post by louise14

doing past papers to prepare, revising calculations would probs be a good idea

Thanks!

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Reply 7

krisachick

OP

Go through previous mark schemes to see exactly what CCEA want you to say for the identification tests :smile:

I'm also going to go over the method of a back titration just incase.

Reply 8

Chriispy

7

Original post by ilovescience123

Hi

I have the AS practical tomorrow, it is my first attempt.

In preparation I am learning the following:

-Identification of organic liquid
-Qualitative Analysis
-Preparation of halogenoalkane
-Removing water of crystallisation
-Iodoform preparation
-Enthalpy of combustion
-Enthalpy of neutralistation
-Reacting elements with water
-Reacting elements with steam
-Titrations
-Calculations

is this enough/am I missing anything? How are you preparing?

Yeh I covered all this stuff as well, sorted I'd say.

Reply 9

a levels

How did you find the AS exam?

Reply 10

Aaroncarlisle

How did you find it? :L

Reply 11

UnknownError

12

What did people get for x? In the na2co3 question. It wasn't too bad!

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Reply 12

Chriispy

7

Original post by UnknownError

What did people get for x? In the na2co3 question. It wasn't too bad!

Posted from TSR Mobile

I thought the exam was sweet overall and 7.

Reply 13

UnknownError

12

Original post by Chriispy

I thought the exam was sweet overall and 7.

Got the exact same woohoo!!! Some questions were slightly tricky like the last one was quite difficult

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Reply 14

condor789

Did yous all get zinc sulfate and ammonium sulfate for inorganic and alcohol for organic? I wrote ester for organic but apparantly it was a long carbon chain non polar alcohol :s-smilie:

Though I'll only lose one mark hopefully. I thought the compound was hydrolysed to produce an alcohol and carboxylic acid and then the alcohol was oxidised by the Potassium dichromate.

Reply 15

BLUERUN

I got aluminium sulfate and ammonium sulfate, I said that the alcohol group was present and that there were no carbon to carbon double bonds, although my bromine water was colorless before i added it so I'm not sure on that?

(edited 10 years ago)

Reply 16

UnknownError

12

Original post by BLUERUN

I got aluminium sulfate and ammonium sulfate, I said that the alcohol group was present and that there were no carbon to carbon double bonds, although my bromine water was colorless before i added it so I'm not sure on that?

I got the same. Forgot the test for magnesium such a stupid mistake.
Bromine water stayed orange. I got an alcohol however it didn't mix with water? Possibly a ketone but doubt they'd make it that hard lol

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(edited 10 years ago)

Reply 17

condor789

Original post by UnknownError

I got the same. Forgot the test for magnesium such a stupid mistake.
Bromine water stayed orange. I got an alcohol however it didn't mix with water? Possibly a ketone but doubt they'd make it that hard lol

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I asked my teacher, It was zinc sulfate and ammonium sulfate and an alcohol. It was immiscible with water cause it had a large hydrocarbon chain.

Reply 18

condor789

Original post by BLUERUN

I got aluminium sulfate and ammonium sulfate, I said that the alcohol group was present and that there were no carbon to carbon double bonds, although my bromine water was colorless before i added it so I'm not sure on that?