Edexcel IGCSE Chemistry Paper 2C-4CH1 12th June 2019 Watch

Kate23456712
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Share your thoughts...
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Goofballx69
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Hope the paper will be easy as the first one....but I doubt it cuz if the first paper is easy then the second paper should be hard.
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elliebellie123
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good luck everyone!! whatever happens at least it’ll be over tomorrow
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elliebellie123
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well that, was a beautiful paper thanks edexcel🙏
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LiamGor
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So true
(Original post by elliebellie123)
well that, was a beautiful paper thanks edexcel🙏
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joejoeeames
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what did everyone get for the last page of calculations?
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aaren_patel
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0.625 for concentration
(Original post by joejoeeames)
what did everyone get for the last page of calculations?
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NebularCortex
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What did everyone get for enthalpy change
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dobbyscoffee
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-788
(Original post by NebularCortex)
What did everyone get for enthalpy change
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joejoeeames
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what did everyone say for the one mark question about equilibrium --> why did the mixture turn brown
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saddddddddddddd
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Anyone know why the mixture got darker and why less No was produces?
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NebularCortex
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I guessed I wrote less n2O4 conc than original mixture
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joejoeeames
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fo the longer question, I put: "an increase in pressure at a constant temperature will cause the equilibrium to favour the side with the fewer moles of gas and therefore favoured the left-hand side (whatever compound that was)"
(Original post by saddddddddddddd)
Anyone know why the mixture got darker and why less No was produces?
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LiamGor
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yea i agree
(Original post by joejoeeames)
fo the longer question, I put: "an increase in pressure at a constant temperature will cause the equilibrium to favour the side with the fewer moles of gas and therefore favoured the left-hand side (whatever compound that was)"
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joejoeeames
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Yeah, I guessed and said some rubbish like "the system may not have been closed", which in retrospect, makes no sense.
--> I'm just guessing Edexcel need to put some difficult one mark question in there to knock seriously brainy kids off their feet...
(Original post by saddddddddddddd)
Anyone know why the mixture got darker and why less No was produces?
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angelnz
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(Original post by saddddddddddddd)
Anyone know why the mixture got darker and why less No was produces?
I put since the pressure increased, the NO gas particles were closer together and more concentrated, to it looks darker.
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NebularCortex
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I don’t think favouring in equilibrium is correct because it said in the syllabus that le cheitler principle is not required
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mp99
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Colour change from ethanol to ethanoic acid is orange to green (not in the CGP guide) i put colourless to black
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Goofballx69
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:lol:..you only lost two marks..so relax
(Original post by mp99)
Colour change from ethanol to ethanoic acid is orange to green (not in the CGP guide) i put colourless to black
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mp99
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For the NO2 one, i said volume decrease so concentration increase, so it gets darker
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