edexcel IGCSE chemistry 1CR 2016

Really? I don't think so, I think it's plausible for there to be no change in yield.

160kg

- Two reasons why putting the lid on the tank with the chromatography experiment in would help - The solvent and dyes wouldnt leave the paper, eg. evaporate?
- Solubility of sulphur dioxide in air and why - Would'nt escape the container
- Three reasons for cracking - To get smaller hydrocarbons for different uses.
- Which reactions for redox reactions - Idk I think it was 6 and forgot otherone
- Why burning C6H12S is bad - it reacts with air to make acid rain, killing off wildlife How many do you think I got right?

What do you think the grade boundary for A* is gonna be?

What do you think the grade boundary for A* is gonna be?

What do you think the grade boundary for A* is gonna be?

- Two reasons why putting the lid on the tank with the chromatography experiment in would help - The solvent and dyes wouldnt leave the paper, eg. evaporate?
- Solubility of sulphur dioxide in air and why - Would'nt escape the container
- Three reasons for cracking - To get smaller hydrocarbons for different uses.
- Which reactions for redox reactions - Idk I think it was 6 and forgot otherone
- Why burning C6H12S is bad - it reacts with air to make acid rain, killing off wildlife How many do you think I got right?

For the lid question i gave
-to prevent overflow of solvet
-prevent loss of solvent by evaloration

For solubility question i showed calculation by dividing the mass by volume got 19.2g/dm³(probably wrong)

For the importance of cracking question the answer is(100% sure on this one,this question appeared before in a past paper)
-produces smaller molecules
-smaller chain molecules are more useful as fuel and has greater demand
-smaller ones burn cleanly as fuel
-cracking produces ethene
-any named use of ethene(e.g. alcohol production)

And for reaction i gave reaction 4 nd 6

And for the sulfide one i gave sulfurdioxide is produced during combustion.the gas is toxic and causes acid rain.

Our school did a mock exam at the beginning of the year, and my predicted grade was an A*. However, given the difficulty of this paper, I'm just aiming for an A/B. As long as I get around 70% I'll be happy.

What do you reckon you're going to get?

For the lid question i gave
-to prevent overflow of solvet
-prevent loss of solvent by evaloration

For solubility question i showed calculation by dividing the mass by volume got 19.2g/dm³(probably wrong)

For the importance of cracking question the answer is(100% sure on this one,this question appeared before in a past paper)
-produces smaller molecules
-smaller chain molecules are more useful as fuel and has greater demand
-smaller ones burn cleanly as fuel
-cracking produces ethene
-any named use of ethene(e.g. alcohol production)

And for reaction i gave reaction 4 nd 6

And for the sulfide one i gave sulfurdioxide is produced during combustion.the gas is toxic and causes acid rain.

What calculation did you do for the hear energy change? Somethingx4.2.....

I wrote it does escape, not sure about the reason though.

That was weird as hell! I got that question wrong. Apparently the line they provided you with in the exam was just the activation energy curve - you had to extend the line and then draw a line downwards and add the products there.

What calculation did you do for the hear energy change? Somethingx4.2.....

What about the one that said sublime and stuff?

What does the paper 1CR mean I do Edexcel iGCSE too but I had paper 1C today