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    (Original post by VetVikki)
    Really stuck on balancing equations with the H+ and H2O .. if anyone can explain I'd be soooo grateful
    Redox?

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    (Original post by samb1234)
    Redox?

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    Yeah however everywhere I've looked just does the half equations like 2Br- --> Br2 + 2e-
    I don't understand how to form equations such as H2SO4 + 6H+ + 6e- --> S + 4H2O
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    (Original post by VetVikki)
    Really stuck on balancing equations with the H+ and H2O .. if anyone can explain I'd be soooo grateful
    There are many equation with H+ and H2O
    Post the question
    Nvm

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    (Original post by chemphys)
    i wasn't asking about the ISA, i think you misunderstood what i was asking but its fine
    Because I offered some help with physics AQA, so many people literally bombard my inbox asking what came up in ISA. It wasn't only intended for you. I am happy to help with any AS physics or chemistry questions. It's just that if you or anyone else ask me what came up in ISA, I report them because it's against regulation of exams as well as TSR.

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    It's more of a general thing that I don't understand when to add H+ and H2O and is there an OH- too!?
    However for example:
    Write the full redox equation for the reaction between sulphuric acid and sodium iodide?
    What are the steps?
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    (Original post by VetVikki)
    It's more of a general thing that I don't understand when to add H+ and H2O and is there an OH- too!?
    However for example:
    Write the full redox equation for the reaction between sulphuric acid and sodium iodide?
    What are the steps?
    It's ionic equation for acid alkali reaction if H+ +OH- ----> H2O.

    You will omit any spectator ion in redox equation
    Sodium ion is a spectator ion because it is unchanged in the reaction.
    Check this link: http://www.chemguide.co.uk/inorganic...tions.html#top
    It explains better than typing all here
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    (Original post by C0balt)
    It's ionic equation for acid alkali reaction if H+ +OH- ----> H2O.

    You will omit any spectator ion in redox equation
    Sodium ion is a spectator ion because it is unchanged in the reaction.
    Check this link: http://www.chemguide.co.uk/inorganic...tions.html#top
    It explains better than typing all here
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    Yep chemguide is always a good source. Just remember the 'whe' rules (water hydrogen electrons) and you'll be fine. Balance anything that isn't hydrogen or water first, then balance oxygen by adding water, then hydrogen to balance hydrogen and electrons to balance charge

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    This is my first time on this site. Can anyone help me with any revision? I have my ISA tomorrow. Im not asking for answers of course, just some equations that I should learn and any other things that will benefit me.
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    (Original post by samb1234)
    Yep chemguide is always a good source. Just remember the 'whe' rules (water hydrogen electrons) and you'll be fine. Balance anything that isn't hydrogen or water first, then balance oxygen by adding water, then hydrogen to balance hydrogen and electrons to balance charge

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    (Original post by C0balt)
    It's ionic equation for acid alkali reaction if H+ +OH- ----> H2O.

    You will omit any spectator ion in redox equation
    Sodium ion is a spectator ion because it is unchanged in the reaction.
    Check this link: http://www.chemguide.co.uk/inorganic...tions.html#top
    It explains better than typing all here
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    Thankyou
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    how many structural isomers of C8 H17Cl and how do you work it out
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    (Original post by grapes12)
    This is my first time on this site. Can anyone help me with any revision? I have my ISA tomorrow. Im not asking for answers of course, just some equations that I should learn and any other things that will benefit me.
    What area is it on? Just for the record I don't do aqa so anything I give you isn't from the isa I don't have a clue what's in it.

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    (Original post by samb1234)
    What area is it on? Just for the record I don't do aqa so anything I give you isn't from the isa I don't have a clue what's in it.

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    It is AQA and it is on titrations. (AS level)
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    (Original post by hum1)
    how many structural isomers of C8 H17Cl and how do you work it out
    Draw them all out
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    (Original post by grapes12)
    It is AQA and it is on titrations. (AS level)
    Well I'd guess that you should probably make yourself familiar with common indicators like methyl orange or phenolphthalein. Maybe things like errors or uncertainties in titrations, moles calculations etc

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    im struglglinh
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    (Original post by hum1)
    how many structural isomers of C8 H17Cl and how do you work it out
    There's no easy way out, you got to draw them all out

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    also another question, how can u work out the angle of a bond . for example state the 3d Dimensional shape of a CF2 Cl2 molecule and the F-C-Cl bond angle
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    (Original post by hum1)
    also another question, how can u work out the angle of a bond . for example state the 3d Dimensional shape of a CF2 Cl2 molecule and the F-C-Cl bond angle

    http://www.chemguide.co.uk/atoms/bonding/shapes.html
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    Cobalt there is an easier way if you're prepared to do a but of maths

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    (Original post by hum1)
    also another question, how can u work out the angle of a bond . for example state the 3d Dimensional shape of a CF2 Cl2 molecule and the F-C-Cl bond angle
    two pairs: linear 180
    three pairs: trigonal planar 120
    four pairs: tetrahedral 109.5
    five pairs: trigonal bipyramid 120 and 90
    six pairs: octahedral 90
 
 
 
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