IGCSE CHEMISTRY 2013 (May 20th & June 10th)

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Original post by Bude8

The line is not straight at any point.

I put the line did not level off (eg the experiment did not finish as the solid was still not in excess) Do you think that is acceptable? Thanks!

Wat was the reason for the anomaly

Original post by mm97123

Why was the experiment not complete in the graph question and what do you think we had to say for five marks for the nitrogen and silicon question?

Was it the temperature was still decreasing

giuliaprivato98

Original post by king cobra

Was it the temperature was still decreasing

ya i wrote that. what did du write for the 2 factors (sa of the marble chips and ...)?

Mass

giuliaprivato98

Original post by king cobra

Mass

were there any difficult qs ?

Original post by giuliaprivato98

ya i wrote that. what did du write for the 2 factors (sa of the marble chips and ...)?

I put mass and type of Marble chip

giuliaprivato98

@iaramark it was 500

giuliaprivato98

ANYONE WHO DID ENGLISH GCSE EDEXCEL CAN DISCUSS IT ON HERE:
http://www.thestudentroom.co.uk/showthread.php?t=2357780

giuliaprivato98

Is there a theread on igcse business edexcel?

Original post by giuliaprivato98

Is there a theread on igcse business edexcel?

Please tell me if you find out there is :-)

Posted from The Student's Room iPhone/iPad App

For the 2 types of reaction it was EXOTHERMIC AND NEUTRALISATION

giuliaprivato98

Original post by N Kay

Please tell me if you find out there is :-)

Posted from The Student's Room iPhone/iPad App

http://www.thestudentroom.co.uk/showthread.php?t=2358319&p=42729072#post42729072

giuliaprivato98

Original post by SaeddFarah

For the 2 types of reaction it was EXOTHERMIC AND NEUTRALISATION

Congrats! Me too. :biggrin:

:biggrin:

Original post by giuliaprivato98

Congrats! Me too. :biggrin:

:biggrin:

Wait wasnt it Endothermic? The temperature went down?

I found it pretty good. Just a few things:
1) why did she get the anomalous result? I put human and mathematical error
2) Why was a burette better than a pipette? I put because it has markers on the side so you can see how much you put in.
3) Was the two types of reaction endothermic and displacement? because didnt the sodium get displaced
4) Was the reaction between calcium oxide and silicon dioxide in the blast furnace neutralisation?

and sorry lastly was it bromine displaces iodINE or iodIDE

giuliaprivato98

Original post by AdilMalikN

Wait wasnt it Endothermic? The temperature went down?

Nop if the temperature went down this means heat went from the raction-surroundings (heat was lost as it heated up the surroundings) thus exothermic.
Endothermic would have been if temp increase as you neeeded to heat it :tongue:

:tongue:

giuliaprivato98

Original post by neo25

and sorry lastly was it bromine displaces iodINE or iodIDE

well i wrote iodine.
3) exothermic and neutralization
1) anomalous result reaction time too long or misread readings.
2) burette better as it had the markers and even bec it was larger.

It's endothermic search the reaction online
And was the anomalus readily reaction time and too Much acid

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