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

    10
    ReputationRep:
    Could someone explain the answer it’s from aqa specimen 2018 the ans is +30 to +120
    Posted on the TSR App. Download from Apple or Google Play
    • Thread Starter
    Offline

    10
    ReputationRep:
    Name:  C541DBCB-B378-4075-B719-CD3DEFD5D94B.jpg.jpeg
Views: 6
Size:  20.1 KBName:  3F8D6C12-4DBE-4D9E-BFEE-C244ED361D96.jpg.jpeg
Views: 6
Size:  9.1 KB
    Posted on the TSR App. Download from Apple or Google Play
    • Thread Starter
    Offline

    10
    ReputationRep:
    the question was predict the boiling point of bromine the MS says+30 to +120 I wrote 149 ( wrong answer) How do i do the calculation?
    Offline

    9
    ReputationRep:
    (Original post by Laboromniavincit)
    the question was predict the boiling point of bromine the MS says+30 to +120 I wrote 149 ( wrong answer) How do i do the calculation?
    Hello,
    The question is about predicting, so there is no method to arrive at the final answer. You have to see the trend of the halogens down the group. in this case it is increasing. See the depth of the increase and then use the difference to find the value for bromine. From F to Cl it is approximately 150. Add 150 to Cl value you should get 115 which is in the range of 30 to 120. But I would also suggest you to use a lower value since the depth of increase is decreasing slowly. Iodine has 184. Here the difference is so small, so decrease the value of Br at least to 30. You should get 85 which is the perfect answer
    Posted on the TSR App. Download from Apple or Google Play
    • Thread Starter
    Offline

    10
    ReputationRep:
    (Original post by cpocha1)
    Hello,
    The question is about predicting, so there is no method to arrive at the final answer. You have to see the trend of the halogens down the group. in this case it is increasing. See the depth of the increase and then use the difference to find the value for bromine. From F to Cl it is approximately 150. Add 150 to Cl value you should get 115 which is in the range of 30 to 120. But I would also suggest you to use a lower value since the depth of increase is decreasing slowly. Iodine has 184. Here the difference is so small, so decrease the value of Br at least to 30. You should get 85 which is the perfect answer
    THANKS !!!!!!
    Offline

    9
    ReputationRep:
    (Original post by Laboromniavincit)
    THANKS !!!!!!
    can I know a bit about u?
    Posted on the TSR App. Download from Apple or Google Play
    Offline

    3
    ReputationRep:
    cpocha1, talking a load of rubbish once again
    • Thread Starter
    Offline

    10
    ReputationRep:
    I am in yr 10 and want to hv good score in STEM subjects but at the moment feeling bit overwhelmed with new topics .. why do you ask?
    Posted on the TSR App. Download from Apple or Google Play
    • Thread Starter
    Offline

    10
    ReputationRep:
    (Original post by Jack Scholeyyyy)
    cpocha1, talking a load of rubbish once again
    his answer is succint with regards to query , is it not?
 
 
 
  • 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 newspaper do you read/prefer?
  • 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.