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    so what would it be for

    potassium chloride

    calcium bromide

    sodium floride

    there the lat ones i have to work out but im loosing the plot here
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    (Original post by JonoB)
    so what would it be for

    potassium chloride

    calcium bromide

    sodium floride

    there the lat ones i have to work out but im loosing the plot here
    lol, if you have a data book, did you know that you can find all these half eqns very easily, but anyway, here is the trick, analyse the example i give and then try for the remaining ones,

    NB: you must know how to write the correct formula for the above chemical compounds.

    1) KCl : K+ and Cl- are the ions

    K+ + e- ----> K

    1/2Cl2 + e- ----> Cl-

    This is usually the way it is written in data book, ie reduction process; there is a reason for this, but you might not be expected to know it now.

    2) Another example,

    CaBr2 : Ca2+ , 2 x Br-

    Ca2+ + 2e ----> Ca
    Br2 + 2e- ----> 2Br-

    Notice how the number of electrons cancel out from these half equations once you take the difference from the other, and hence your compound is electronically neutral.

    try yourself for the other two!
 
 
 
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