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

    2
    ReputationRep:
    (Original post by I <3 WORK)
    Do you guys remember what was the question about relating to the -OH observation?
    It was basically about how to test for the presence of the -OH group
    Offline

    2
    ReputationRep:
    (Original post by NNB_Herath)
    are you sure ???????? (((
    Yup
    Offline

    9
    ReputationRep:
    (Original post by notsoclueless)
    It was basically about how to test for the presence of the -OH group
    And do you remember was this question before or after the haloalkane ( E F G) one ?
    Offline

    2
    ReputationRep:
    (Original post by IAROX15)
    But the x-axis was discrete data. How could that be a line graph?
    But a line graph is most suitable as it lets us see the overall trend, yes? It's easier to interpret that way, especially because in the next question, we were asked to give an estimate for some C3H7OH, I think. How could you have gotten an estimate using a bar graph?
    Offline

    0
    ReputationRep:
    Test for OH is universal indicator turning purple/blue
    Ugh forgot about K2CO3, wrote K2O instead
    Messed up on conversion from G to F
    Incomplete combustion is invalid as mass of alcohol burnt is lower so no. of moles of alcohol is lower. Delta H= energy divided by moles so if moles is smaller, Delta H would be higher thus its invalid. The only valid point was heat loss.
    Hoping for 45 :/
    Offline

    2
    ReputationRep:
    (Original post by I <3 WORK)
    And do you remember was this question before or after the haloalkane ( E F G) one ?
    It was part of the same question.
    Like the first part, we had to name E I think.
    The next had to do with the test for the -OH group, if my memory serves me right
    The haloalkane one came after this part. Towards the end.
    Offline

    2
    ReputationRep:
    (Original post by I <3 WORK)
    And do you remember was this question before or after the haloalkane ( E F G) one ?
    it was below the E F G Table
    Offline

    2
    ReputationRep:
    (Original post by pondsteps)
    i wrote cornical granles!!! smthn from bio what the heck lool
    Cortical granules? :P Those come in during fertilization of the ovum :P
    Offline

    12
    ReputationRep:
    (Original post by notsoclueless)
    Cortical granules? :P Those come in during fertilization of the ovum :P
    ik lol i had bio the day before sooo
    Offline

    2
    ReputationRep:
    (Original post by dilmaths)
    Test for OH is universal indicator turning purple/blue
    Ugh forgot about K2CO3, wrote K2O instead
    Messed up on conversion from G to F
    Incomplete combustion is invalid as mass of alcohol burnt is lower so no. of moles of alcohol is lower. Delta H= energy divided by moles so if moles is smaller, Delta H would be higher thus its invalid. The only valid point was heat loss.
    Hoping for 45 :/
    I wrote K2O as well :P
    Offline

    2
    ReputationRep:
    (Original post by notsoclueless)
    It was basically about how to test for the presence of the -OH group
    I wrote add potassium IV dichromate and it would change from orange to green :P
    Offline

    3
    ReputationRep:
    (Original post by pondsteps)
    ik lol i had bio the day before sooo
    this made me laugh so much xD
    +1 rep
    Offline

    2
    ReputationRep:
    (Original post by pondsteps)
    ik lol i had bio the day before sooo
    Unit 3 yeah? How did you find that paper? I loved the fact that Daphnia came :P
    Offline

    0
    ReputationRep:
    (Original post by notsoclueless)
    I wrote K2O as well :P
    Ugh maybe we get 1/2 ? Cuz everything was balanced and seemed perfect
    Offline

    2
    ReputationRep:
    (Original post by Hamadtype-)
    I wrote add potassium IV dichromate and it would change from orange to green :P
    Ahhh :P I wrote add phosphorus (v) chloride and misty fumes could be seen :P
    Offline

    12
    ReputationRep:
    (Original post by notsoclueless)
    Unit 3 yeah? How did you find that paper? I loved the fact that Daphnia came :P
    yeah i actually found the paper tricky
    Offline

    2
    ReputationRep:
    (Original post by dilmaths)
    Ugh maybe we get 1/2 ? Cuz everything was balanced and seemed perfect
    I hope so :/
    Lets just hope all the other units go well
    Offline

    0
    ReputationRep:
    OH observation is universal indicator turning purple.
    Dammit forgot about K2CO3, wrote K2O instead
    Incomplete combustion is invalid since this would mean mass of alcohol burnt would be lower thus no. of moles of alcohol would be low. Delta H = Energy divided by moles so lower moles means higher Delta H thus its invalid
    Messed up on conversion from G to F
    Hoping for around 45 :/
    Offline

    12
    ReputationRep:
    (Original post by notsoclueless)
    I wrote K2O as well :P
    arent we supposed to write k2o in the equation... why is it wrong??
    Offline

    2
    ReputationRep:
    (Original post by pondsteps)
    yeah i actually found the paper tricky
    Unit 6 is on Friday. I'm more nervous about that :/ I mean, writing that 10 mark answer needs a lot of thinking and stuff
    And I do hope for the second question, they don't introduce some new mathematical concept.
 
 
 
  • 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
    Brussels sprouts
  • 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.