AQA AS Chemistry 7404/1 and 7404/2 - 27th May 2016 and 10th June 2016

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Original post by spidle

Think it was forward reaction exo and NO2 was brown?

Empirical formula for the hydrocarbon?

Was it c3h8

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Original post by moshe015

What did people get for question 9, percentage mass of magnesium chloride of powder???

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79%??

Original post by RoughER

Empirical formula for the hydrocarbon?

Was running out of time and guessed C5H12 lol.

Original post by spidle

Think it was forward reaction exo and NO2 was brown?

I said the forward was exo while the product on the right was colourless :/

Was one of the options ' forward reaction is endothermic and NO2 get colourless'?

How was the exam overall? Did you guys find it really hard or okay? Do you think the grade boundaries will be lower than 80%

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Yes and that was the correct answer I'm not sure what other people are talking about

Original post by Splaffie

Yes and that was the correct answer I'm not sure what other people are talking about

What Q are you referring to?

Hard

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GabbytheGreek_48

clfl3 wen both group 7 and chlorine is one of the most reactive gases

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IntellectualBoss

help me make an unofficial mark scheme at http://www.thestudentroom.co.uk/showthread.php?t=4124645 I'll compile the answers estimate marks after

Original post by RoughER

Empirical formula for the hydrocarbon?

I got C3H8

There was nothing on energetics(I think), I assume there will be on paper 2!

Original post by marcobruni98

There was nothing on energetics(I think), I assume there will be on paper 2!

Energetic and collisions is in paper 2 anyways. It says on the specification

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Original post by spidle

Think it was forward reaction exo and NO2 was brown?

I got exothermic and brown as well

Original post by DaVinciGirl

Energetic and collisions is in paper 2 anyways. It says on the specification

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Energetics is on both papers, they just didn't have any.

Hopefully there will be less maths in paper 2 though...

Original post by RoughER

Empirical formula for the hydrocarbon?

C3H8 I think it was. Find total RFM (which is 44 here) then do RFM of C (so in this case 12 x 3 = 36) and divide 36 by 44 which gets 9/11 😊
(P.S. I spent like 5 minutes trying to figure this out and only realised in the last minute of the test 😂)

Did anyone do the CHEM 1 resit?

I got ch3 for some reason

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