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    (Original post by Supergirlxxxxxx)
    Last question is SiO4^4-


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    Is that what you put? That's more of an F335 question really, pretty hard for F331
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    (Original post by f.loco)
    I put SiO3^2- is this right

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    That's what i put, i just assumed it was like carbonate but with silicon.
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    (Original post by Supergirlxxxxxx)
    Last question is SiO4^4-


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    How do u know look at
    http://sciencenotes.org/polyatomic-i...ilicate_anion/

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    Any idea how many marks i would lose for putting the expected bond angle as 180, would it just be one? I was an idiot and forgot about the hydrogen's!
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    I don't know how you're meant to 'use you knowledge of the periodic table' to get that. I wouldn't have gotten that even if they gave me an extra hour.
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    The question about what yo would see when Carbonate heated was 2 marks:
    -cloudy
    -fizzing/bubbles due to CO2?
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    What did everyone write for the Mendeleev question? And the question about the configuration of germanium? I hated that one because it's in group 4, but I kept on getting 6 as the last number? Oh and also the question on zeolite?
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    (Original post by Alirna)
    Any idea how many marks i would lose for putting the expected bond angle as 180, would it just be one? I was an idiot and forgot about the hydrogen's!
    I put expected as 180 because c-c-c is linear (without the hydrogens). Cyclopropane is a triangle shape but I put the actual angle as 109. I probably lost a couple of marks there then.
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    (Original post by Marli-Ruth)
    The question about what yo would see when Carbonate heated was 2 marks:
    -cloudy
    -fizzing/bubbles due to CO2?
    I put:
    -Lime water goes milky
    -Bubbling occurs in limewater

    What did you put for keeping the two things constant for the experiment?
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    (Original post by KingdomOfTheLord)
    What did everyone write for the Mendeleev question? And the question about the configuration of germanium? I hated that one because it's in group 4, but I kept on getting 6 as the last number? Oh and also the question on zeolite?
    You'd say it has similar physical and chemical properties of calcium. It said highest energy level so 4P2. Zeolite is used as a catalyst


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    (Original post by Adam971)
    I put:
    -Lime water goes milky
    -Bubbling occurs in limewater

    What did you put for keeping the two things constant for the experiment?
    Same volume of limewater. Same heating conditions/temperature at which the carbonate is heated


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    (Original post by Supergirlxxxxxx)
    You'd say it has similar physical and chemical properties of calcium. It said highest energy level so 4P2. Zeolite is used as a catalyst


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    What did you put for the zeolite question for cracking? I just put 'to separate branched and straight chain molecules'.
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    (Original post by Supergirlxxxxxx)
    Same volume of limewater. Same heating conditions/temperature at which the carbonate is heated


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    I put same volume of limewater and same mass of carbonate. Is that correct too?
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    Do you guys feel SiO3 2- will get atleast a mark ?
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    (Original post by Adam971)
    What did you put for the zeolite question for cracking? I just put 'to separate branched and straight chain molecules'.
    That's only used in isomerisation to separate branches from unbranced


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    (Original post by Supergirlxxxxxx)
    You'd say it has similar physical and chemical properties of calcium. It said highest energy level so 4P2. Zeolite is used as a catalyst


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    I meant the question about why Mendeleev (?) left a gap, hun. Ughhh I knew it was 4P2 but I thought it said configuration (( It's so easy to lose marks in this paper, I think I've lost about 10-12 so far because of silly mistakes like not adding a minus How'd you find it?
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    Branched* from unbranced


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    (Original post by Adam971)
    I put:
    -Lime water goes milky
    -Bubbling occurs in limewater

    What did you put for keeping the two things constant for the experiment?
    (Original post by Marli-Ruth)
    The question about what yo would see when Carbonate heated was 2 marks:
    -cloudy
    -fizzing/bubbles due to CO2?
    Do I get 2marks for saying
    Lime water goes cloudy as CO2 forms a precipitate (no named colour)

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    Stupid autocorrect
    * unbranchedd


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    (Original post by Adam971)
    I put:
    -Lime water goes milky
    -Bubbling occurs in limewater

    What did you put for keeping the two things constant for the experiment?
    Amount of lime water and amount of carbonate wbu
 
 
 
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