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chemistry ""a" level" notes

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    chemistry ""a" level" notes

    can someone please post thier exaam ntes on chem pls

    i would veery muuch appreciate dis
    btw exam board ocr

    n on d sidenote nyone got biochem notes for ocr
    n plus
    biochem 2007 n 2008 paper

    nyone of above would be appreciated very much
    jazakhaalhukhair

    #2
    Re: chemistry ""a" level" notes

    AS or A2?New specification or old?
    Any topic in particular?

    Comment


      #3
      Re: chemistry ""a" level" notes

      Originally posted by Unique Muslimah View Post
      AS or A2?New specification or old?
      Any topic in particular?
      allahu akbar

      its the old spec
      if you got notes on biochemisstry it would be helpful
      organic chem will be useful as well later onwards
      basicaly m retakin every unit in chem so basically m doin a 2 yr course in 1 year:(
      so ny a2 notes will b good esp on trennnds n paaatern, as foundation
      right now m taking a2 units of biochem, trends n paaatern, and as foundationnn. june will be chains n rings, chains ring n spectoscopy(or whaeva its called) n unifyin conceptss
      lol soooooo every little contribution counts
      may allah increase the knowledge in those who help me through the hard times ameen
      btw Ocr spec
      condensed n short notes would b ideal for me inshallah
      ws

      Comment


        #4
        Re: chemistry ""a" level" notes

        I have loads of hand written notes,but I don't know how exactly I'd get them to you,because there are loads..
        I never did a module called BioChem,so Im sorry I wont be able to help you there..But I did do foundation,chains and rings,how far how far how fast and am doing the A2s at the moment.
        Basically,I don't use the actual OCR book for chemistry,because there are LOADS of mistakes in that book..
        I use these books and I find them to be REALLY good
        http://www.amazon.co.uk/Essential-AS...3686134&sr=1-1
        http://www.amazon.co.uk/Essential-A2...3686066&sr=8-1
        Absolutely EVERYTHING you need in there,nothing else except what's required..All my class notes I am pretty sure they're taken out of these books,and my class notes given by my teacher are amazing..(and therefore so are these books:D)
        They're a little on the expensive side,but you could sell them on afterwards if you wanted..
        I can give you a link to the papers though if you want,will PM that you inshaAllah..for all modules from 03 I think,hopefully to present.Btw all the papers are available on the OCR website..

        Comment


          #5
          Re: chemistry ""a" level" notes

          jazakalah UM
          you know for a2 what topics are you studying right now
          and what optional unit did your college choose for you

          Comment


            #6
            Re: chemistry ""a" level" notes

            Chains Rings and Spec
            Trends & Patterns
            Unifying Concepts..

            Comment


              #7
              Re: chemistry ""a" level" notes

              can you please explain this to me n give me like an exam answer at the end please

              1)explain why chlorine ,bromine and iodine have different physical state at room tempreture and pressure(4)

              2)an aqueos solution of bromine was added to an aqueous solution of chlorine ions and also to an aqueos solution to iodide ions
              -state what you would see in each case
              -include an equation for any chemical reaction that takes place
              - explain the trend shown by these observation (4)

              jazakalah

              Comment


                #8
                Re: chemistry ""a" level" notes

                1) At room temp cl is a gas,bromine is a liquid,iodine is a solid..
                this is because,as we go down group 7,
                number of electrons increase as we go down the group..
                the strength of intermolecular VDW increases due to there being a greater number of electrons and so the molecule size increases..
                and so there are stronger forces between the molecules..(cl being gas,has the weakest force betw molecules and therefore is a gas..and iodine has the strongest to hold it tgether n therefore takes form of a solid)

                Gerrit?:DThat should give you four marks right there
                Lemme just do the other one now..

                Comment


                  #9
                  Re: chemistry ""a" level" notes

                  Originally posted by Unique Muslimah View Post
                  1) At room temp cl is a gas,bromine is a liquid,iodine is a solid..
                  this is because,as we go down group 7,
                  number of electrons increase as we go down the group..
                  the strength of intermolecular VDW increases due to there being a greater number of electrons and so the molecule size increases..
                  and so there are stronger forces between the molecules..(cl being gas,has the weakest force betw molecules and therefore is a gas..and iodine has the strongest to hold it tgether n therefore takes form of a solid)

                  Gerrit?:DThat should give you four marks right there
                  Lemme just do the other one now..
                  jazakahlah
                  i kind of got 2 marks for this i think

                  Comment


                    #10
                    Re: chemistry ""a" level" notes

                    2)
                    when bromine is added tp the iodide ions,the bromine would displace the iodide ions as iodine has less oxidising power than bromine ..there would be a colour change from red brown--> purple.. and the equation : Br2 + 2I- ---> 2Br - + I2
                    when bromine is added to to chloride ions,there will be no reaction,and it will remain red brown..
                    Bromine has a lower oxidising power than chlorine but not of Iodine.This shows that as your go down group 7 the Oxidising power decreases..

                    I reckon that'd give you 4 marks aswell..

                    Comment


                      #11
                      Re: chemistry ""a" level" notes

                      I'm revising Chains Rings and Spec at the moment,so I might not be able to answer straight away but I will get back to you when I can if you have anymore Qs..:up:

                      Comment


                        #12
                        Re: chemistry ""a" level" notes

                        jazakahlah i actually kind of get it now

                        need to learn one or two things thats all

                        thanks for all the help lol but this is jus d start lol some more question will be coming be prepared lol

                        n jazakahalhu khayr for everythin

                        Comment


                          #13
                          Re: chemistry ""a" level" notes

                          Originally posted by Unique Muslimah View Post
                          I'm revising Chains Rings and Spec at the moment,so I might not be able to answer straight away but I will get back to you when I can if you have anymore Qs..:up:
                          lol go for it revise hard yh cause ill be doin dat unit for d summer exam lol so u can help me out

                          Comment


                            #14
                            Re: chemistry ""a" level" notes

                            h2so4 was added to aqueous Ba(OH)2 untill solution was just nutralised, forming an insoluble salt, BaSO4 n H20

                            -the elctrical conductivity of the solution steadily decreases as the H2SO4 was added

                            explain why the electrical conductivity deacresed?
                            (2)

                            Comment


                              #15
                              Re: chemistry ""a" level" notes

                              and another question(sorry if i am being a pain in d back side lol)

                              bond angle of NCl3 how do you work it out, the names of the shapes

                              and explain why example ncl3 has dis shape?(3 marks)
                              explain why water has dis shape?
                              explain why CO2 has dis shape?
                              what ever the shape of above are
                              and what is a lone pair
                              what is bonding pair
                              easy ways to remeber it

                              sors dis question is bit long due to me not understandin this whole thing

                              Comment

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