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AQA Chemistry Unit 2 (resit) CHEM2 10th June

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Reply 60

lahigueraxxx

Original post by 97Y

Agh, everyone found it easy and now the grade boundaries will be high -_-

Ikr

Everyone doing the exam came out and thought it was so easy... I hope the grade boundaries aren't too unfair

Reply 61

GdotMdot

Honestly the pissest paper I've done. Anyone who's done all the past papers should have found that easy. Only one question was slightly different to previous years and that was the first one which was 7 marks and that was still fairly easy.

Reply 62

Escobarnos10

Anyone else get 351 kjmol-1 for the bond enthalpy question?

Reply 63

High Stakes

Original post by Adilkhanio

It asked for he pros and cons of hydration not fermentation?

Original post by Seclusion

Pretty sure it was Fermentation, but someone else can confirm.

Original post by lahigueraxxx

It was definitely fermentation

Original post by Adilkhanio

Was it pros and cons of fermentation or hydration im sure it was hyrdration as it asked for the conditions for hudration in the qeustion

"On an industrial scale ethanol can be produced from ethene by direct hydration or from glucose by fermentation.

State the conditions for the direct hydration reaction.

State two advantages and two disadvantages of the fermentation method compared with the direct hydration method"

Reply 64

High Stakes

Original post by Bigboss27

For the method question i said add dilute nh3 and time how long it takes to completely dissolve is this right

No. You're measuring how quickly the precipitate forms not how quickly it dissolves.

Reply 65

serayph

Original post by Seclusion

Ba2+ so42- goes to Ba2SO4
Fe + Cu2+ goes to Fe2+ + Cu

Some answers I remember. It was a pretty good paper.

Ba 2+ and SO4 2- go to BaSO4 not Ba2

Reply 66

hopingmedicinae

Original post by Adilkhanio

Was it pros and cons of fermentation or hydration im sure it was hyrdration as it asked for the conditions for hudration in the qeustion

deffo fermentation

I wrote

- depletes land for food crops
- product must be purified

Advantages

- renewable
- C neutral (kinda)

Reply 67

Jamio

I just put the pros amd cons of hydration do you think id still get some of the marks as i did imply how fermentation may be a better or worse process?

Reply 68

Seclusion

Original post by serayph

Ba 2+ and SO4 2- go to BaSO4 not Ba2

Sorry, yea that's what i put. lol

Reply 69

97Y

Original post by lahigueraxxx

Ikr

Everyone doing the exam came out and thought it was so easy... I hope the grade boundaries aren't too unfair

Tbh I think that I really know my stuff and I didn't find it -that- easy..

Reply 70

maestrocam

Original post by isobel.j.l

I agree, it wasnt like the past papers at all

No, they seemed to have changed the style of all the questions, and mixed in ISA-style questions like the new spec.

Reply 71

High Stakes

Original post by Jamio

I just put the pros amd cons of hydration do you think id still get some of the marks as i did imply how fermentation may be a better or worse process?

No marks awarded, except for the conditions part.

Reply 72

Hopefulmedic15

What did everyone put for the observations for Mg with steam (I got the white solid formed but wasn't sure for the second one so put squeaky pop for the Hydrogen gas

Reply 73

username1194172

Anyone else feeling quite confident with how that exam went? I don't think they asked that many demanding questions tbh

Reply 74

Windowswind123

Original post by Hopefulmedic15

What did everyone put for the observations for Mg with steam (I got the white solid formed but wasn't sure for the second one so put squeaky pop for the Hydrogen gas

I put effervescence of H2 and bright white flame

Reply 75

isobel.j.l

Original post by Hopefulmedic15

What did everyone put for the observations for Mg with steam (I got the white solid formed but wasn't sure for the second one so put squeaky pop for the Hydrogen gas

i put white ppt and bright white flame??

Reply 76

isobel.j.l

Original post by maestrocam

No, they seemed to have changed the style of all the questions, and mixed in ISA-style questions like the new spec.

Wayheyyyy just when i thought id survived the isas

Reply 77

username1194172

Original post by Hopefulmedic15

What did everyone put for the observations for Mg with steam (I got the white solid formed but wasn't sure for the second one so put squeaky pop for the Hydrogen gas