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    Help to anyone who's making an unofficial mark scheme, some of the questions and marks given may not be right though:

    1a) Define relative isotopic mass. (2)
    1b) Fill the table in for the atomic structure of a potassium atom and ion. (3)
    1c) How many molecules are in 6.(something)g of SiCl4? (3)
    1d) Draw the symbols for each particle shown in the ionic lattice structure of KCl. (2)

    3a)
    A precipitation reaction was used to identify the iodide present in Potassium Iodide. State the reagent used for this reaction (1)
    3b) Write the ionic equation to show the reaction between this reagent and the Iodide ion, including state symbols. (2)
    3c) What colour would the precipitate containing the iodide ion show? (1)
    3d) A mixture of potassium iodide and bromine was present in a solution. What solvent can be used to identify the presence of iodide in this solution? (1)

    5a) Describe the reactivity of the group 2 metals with chlorine as you descend the group. (5)
    5b)
    State why using graphite or diamond for the first ionisation energy for carbon was (unnecessary?) (1)
    5c) Fill the boxes in of the table stating the properties of lithium, carbon and fluorine (6)

    A few other random questions I can remember (in any order):

    - A student suggested the bond angles in H-N-H would be larger in NH3BF3 than NH3, suggest why. (3 marker I think)
    - What bond angles are present in the F-B-F in: i) BF3 ii) NH3BF3 (2)
    - Phosphene gas reacts with oxygen to form P4010 and water. Write out the equation for this reaction. (1)
    - Why does PH3 have a lower boiling point than NH3? (1)
    - Why is N2SO4 described as a salt? (1)
    - State the main types of intermolecular forces in NH3 and PH3 (2)
    - Give the equation for the reaction between Aluminium Oxide and sulphuric acid, including state symbols. (2)
    - Work out the number for X in (metal).XH2O
    - Using oxidation numbers, state why the reaction of P4 was a disproportionation reaction (3)
    - Write out the equation for the reaction between Chlorine and water. Explain why the litmus paper turned red. (2)
    - Define 'dative covalent bond'. (1 or 2?)
    - Using dot and cross diagrams, draw the bonding in NH3BF3 and label the dative covalent bond. (2)
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    (Original post by jackitsme)
    i just said carbon makes diamond and graphite,its the building block of them so carbon is used rather than blah blah
    Considering it was about ionisation energy I went on one about that carbon in both states has the same electron configuration :confused:
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    (Original post by Freddy-Francis)
    i diviided by 3 :eek:
    Ah unlucky mate, you had to times by 3
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    (Original post by Fullycorporate)
    Are you sure the first equation is balanced equation correctly? Seems like there are too many hydrogens on the right side, think it should be 3H2O?

    And Reaction of chlorine and water forms HOCL but im pretty sure HCLO is the same thing
    im sure its 3 H2O
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    (Original post by Fullycorporate)
    Are you sure the first equation is balanced equation correctly? Seems like there are too many hydrogens on the right side, think it should be 3H2O?

    And Reaction of chlorine and water forms HOCL but im pretty sure HCLO is the same thing
    its 2Cl2 + 2H2O ---> 4HCL + O2
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    (Original post by theCreator)
    Just remembered the whole of question 3 or something.

    -Reagent was Silver Nitrate AgNO3

    -If iodide was present, yellow precipitate would form

    -To show it was a mixture of bromide and iodide ions we would add concentrated ammonia (NH3)
    I totally forgot about the concentrated part, I wrote NH3, do you think i'll get the mark?
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    (Original post by theCreator)
    Ah unlucky mate, you had to times by 3
    i times it by 3 ? and then times it by 24000 which gave 108 ? tell me what i did wrong :L
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    (Original post by jackitsme)
    i just said carbon makes diamond and graphite,its the building block of them so carbon is used rather than blah blah
    I said they're allotropes of carbon?
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    (Original post by Freddy-Francis)
    its 2Cl2 + 2H2O ---> 4HCL + O2
    Again sorry that's wrong, it's:

    Cl2 + H20 ---> HCl + HClO
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    (Original post by moonziggy)
    I totally forgot about the concentrated part, I wrote NH3, do you think i'll get the mark?
    ahh i wrote cyclohexene!! LOOL
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    (Original post by MichaelP96)
    I said they're allotropes of carbon?
    nice word,yep,basically they make the covelnt structures so yep a mark!
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    (Original post by moonziggy)
    I totally forgot about the concentrated part, I wrote NH3, do you think i'll get the mark?
    Maybe, but I doubt it, because in the concentration of ammonia is very important in determining the ions present
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    (Original post by Freddy-Francis)
    its 2Cl2 + 2H2O ---> 4HCL + O2

    No, H2O + CL2 --> HCL + HCLO (chlorate (I))
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    (Original post by Freddy-Francis)
    i diviided by 3 :eek:
    You had to times it my freind. There was a 3:1 ratio!
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    (Original post by jackitsme)
    ahh i wrote cyclohexene!! LOOL
    me too!!!!
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    (Original post by jackitsme)
    i times it by 3 ? and then times it by 24000 which gave 108 ? tell me what i did wrong :L
    The multiplying by 3 and the multiplying by 24,000 are 2 seperate questions, i think you're getting confused. The volume of gas was 360cm^3 of PH3. But the volume of NaOH was 22.5
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    (Original post by jackitsme)
    ahh i wrote cyclohexene!! LOOL
    LOL me too! I totally forgot about Concentrated NH3
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    For the ionic equation of Ag and I, did it ask for state symbols in the question?
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    (Original post by Freddy-Francis)
    its 2Cl2 + 2H2O ---> 4HCL + O2
    Check the OCR Chem AS textbook, its given as

    Cl2 + H20 ---> HOCl + HCl
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    (Original post by sab8)
    For the ionic equation of Ag and I, did it ask for state symbols in the question?
    Yes it did.

    Ag+ (aq.) + I- (aq.) ---> AgI (s)
 
 
 
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