Hey there! Sign in to join this conversationNew here? Join for free
    Offline

    2
    ReputationRep:
    (Original post by B50les)
    I got 4 for y
    I also got 2 :/ I dont know if its right though...? But my logic was that if FeOy exists, the Fe can only be Fe3+ or Fe2+ and if it was Fe3+ then you'd have to have 9 oxygens which sounds quite unreasonable...? You might be right though it was only a guess! D:
    Offline

    2
    ReputationRep:
    (Original post by Zuzuvela)
    No it would be Nitrogen (I) Oxide . N2O. Colourless Gas so it was trick question

    Posted from TSR Mobile
    I put that too
    Offline

    2
    ReputationRep:
    (Original post by HecTic_H)
    Anyone smart enough and confident enough to make an unofficial Mark scheme?
    You might as well become a comedian Of course no one is gonna be able to make an unofficial mark scheme its OCR!!! 😂😂😂
    Offline

    2
    ReputationRep:
    (Original post by KatieAlicexxx)
    I put -7 fml

    Posted from TSR Mobile
    I put that as well 😂
    Offline

    0
    ReputationRep:
    (Original post by noname102)
    Anyone remember the temperature one - min temperature or something?
    the entropy one? i think i got 480 or something similar
    Offline

    0
    ReputationRep:
    a few questions i can remember.... reply and add your answers

    moleculuar forumula?
    saturated functional group?
    strange hydrogen bonding question
    kc units
    if reaction was exo/endo thermic
    activation enthalpy question
    pH
    How it acts as buffer
    pH when the salt is twice acid or whatever
    bond angle
    electon arrangments (last question)
    how to make compound B from E (reagents)
    temperature for reaction to occur?
    value of n?
    value of y?
    colour
    why iron is coloured
    electronic energy levels question
    number of hydrogen environments
    the freezing temperature
    overall reaction from the 5 different reactions
    atom economy
    nh4no3 decomposition
    glc question
    reagents for benzene nitration
    what effect imatanib has on active site
    why calcium ions are ..... (above question about drawing calcium ion hydrated)
    question about kc and wanting to find concentration of water
    Offline

    2
    ReputationRep:
    moleculuar forumula:

    saturated functional group: Alkane.

    strange hydrogen bonding question:
    Standard AS answer on how hydrogen bonds form. That molecule didn't have any.

    Kc units: top amd bottom cancel out so no units. Same amount of moles on both side

    if reaction was exo/endo thermic : Exothermic as increased temp decreased Kc. More reactants

    Why one ion has more exothermic solubility than other: More charge dense. More strongly hydrated. More bonds made. Bond making exothermic.

    activation enthalpy question: minimum enthalpy required for reaction to take place. Catalysts provide alternative reaction route with lower Ea
    pH

    How it acts as buffer

    pH when the salt is twice acid or whatever: 9.55

    bond angle 109 standard answer + nitrogen has lone pair

    electon arrangments (last question) [Ar] 3d5

    how to make compound B from E (reagents)

    temperature for reaction to occur?
    value of n? 1
    value of y? 4
    colour: yellow

    why iron is coloured

    electronic energy levels question

    number of hydrogen environments : 3 environments
    the freezing temperature: -1.9c

    overall reaction from the 5 different reactions: can't remember exactly but it was an ionic substitution

    atom economy 100% no waste

    nh4no3 decomposition NH4NO3 --> 2H2O + N2O

    N2O : Nitrogen (I) Oxide . Colourless Gas
    glc question:

    reagents for benzene nitration HNO3, Conc H2SO4 and

    what effect imatanib has on active site. Blocks it; Reduces enzyme activity

    question about kc and wanting to find concentration of water
    Offline

    11
    ReputationRep:
    (Original post by Zuzuvela)
    moleculuar forumula:

    saturated functional group: Alkane.

    strange hydrogen bonding question:
    Standard AS answer on how hydrogen bonds form. That molecule didn't have any.

    Kc units: top amd bottom cancel out so no units. Same amount of moles on both side

    if reaction was exo/endo thermic : Exothermic as increased temp decreased Kc. More reactants

    Why one ion has more exothermic solubility than other: More charge dense. More strongly hydrated. More bonds made. Bond making exothermic.

    activation enthalpy question: minimum enthalpy required for reaction to take place. Catalysts provide alternative reaction route with lower Ea
    pH

    How it acts as buffer

    pH when the salt is twice acid or whatever: 9.55

    bond angle 109 standard answer + nitrogen has lone pair

    electon arrangments (last question) [Ar] 3d5

    how to make compound B from E (reagents)

    temperature for reaction to occur?
    value of n? 1
    value of y? 4
    colour: yellow

    why iron is coloured

    electronic energy levels question

    number of hydrogen environments : 3 environments
    the freezing temperature: -1.9c

    overall reaction from the 5 different reactions: can't remember exactly but it was an ionic substitution

    atom economy 100% no waste

    nh4no3 decomposition NH4NO3 --> 2H2O + N2O

    N2O : Nitrogen (I) Oxide . Colourless Gas
    glc question:

    reagents for benzene nitration HNO3, Conc H2SO4 and

    what effect imatanib has on active site. Blocks it; Reduces enzyme activity

    question about kc and wanting to find concentration of water
    What was the -CH3O group on the benzene then?
    Offline

    2
    ReputationRep:
    (Original post by Loyota)
    What was the -CH3O group on the benzene then?
    Ether?
    Offline

    11
    ReputationRep:
    (Original post by _MAT_)
    Ether?
    Therefore it can hydrogen bond by acting as a hydrogen bond acceptor.
    Offline

    2
    ReputationRep:
    (Original post by Loyota)
    Therefore it can hydrogen bond by acting as a hydrogen bond acceptor.
    That's what I put, it can form a few hydrogen bonds but not many when paired with another molecule which is able to form hydrogen bonds
    Offline

    11
    ReputationRep:
    (Original post by _MAT_)
    That's what I put, it can form a few hydrogen bonds but not many when paired with another molecule which is able to form hydrogen bonds
    Yes
    Offline

    2
    ReputationRep:
    (Original post by Loyota)
    Yes
    Good good
    Offline

    10
    ReputationRep:
    (Original post by Zuzuvela)

    number of hydrogen environments : 3 environments
    the freezing temperature: -1.9c
    I got 6 environments and -2.9 for these two. Did you forget that it was CaCl2 so 3 moles of particles rather than the two in NaCl?
    Offline

    2
    ReputationRep:
    (Original post by Bruhh)
    I got 6 environments and -2.9 for these two. Did you forget that it was CaCl2 so 3 moles of particles rather than the two in NaCl?
    6 hydrogen environments is wildly wrong. NMR with more than 4 peaks just doesn't happen at A2.
    You may be correct -1.9 was an answer that a majority got. It wasn't clear what was meant by particles dissolved (already dissolved or to be dissolved) whether it was talking about the ions or the solute overall. Some of those answers were suggested btw not necessary what I put.

    Posted from TSR Mobile
    Offline

    11
    ReputationRep:
    (Original post by Zuzuvela)
    6 hydrogen environments is wildly wrong. NMR with more than 4 peaks just doesn't happen at A2.
    You may be correct -1.9 was an answer that a majority got. It wasn't clear what was meant by particles dissolved (already dissolved or to be dissolved) whether it was talking about the ions or the solute overall. Some of those answers were suggested btw not necessary what I put.

    Posted from TSR Mobile
    Wildly correct more like.
    Offline

    10
    ReputationRep:
    (Original post by Zuzuvela)
    6 hydrogen environments is wildly wrong. NMR with more than 4 peaks just doesn't happen at A2.
    You may be correct -1.9 was an answer that a majority got. It wasn't clear what was meant by particles dissolved (already dissolved or to be dissolved) whether it was talking about the ions or the solute overall. Some of those answers were suggested btw not necessary what I put.

    Posted from TSR Mobile
    Hmm okay, but I thought if you had a group on the benzene the environments were slightly different like in this image:

    Offline

    3
    ReputationRep:
    anyone else get 9.5 or something for the pH ones? lol I'm props wrong i hate calculations
    Offline

    3
    ReputationRep:
    (Original post by Bruhh)
    Hmm okay, but I thought if you had a group on the benzene the environments were slightly different like in this image:


    not sure why you'd have one hydrogen environment with 2 hydrogens in that are opposite sides of the ring?
    Offline

    10
    ReputationRep:
    (Original post by millss)
    not sure why you'd have one hydrogen environment with 2 hydrogens in that are opposite sides of the ring?
    Well its symmetrical so thats where the opposite sides comes from. The image is from a UCLA pdf on NMR.
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    What's your favourite Christmas sweets?
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

    Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

    Quick reply
    Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.