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    'draw the shape of PO4 (-3) ( the -3 is the charge on the ion)'

    So can you use the shape of PO4 and add 3 electrons to your dot and cross diagram?
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    (Original post by indignation)
    'draw the shape of PO4 (-3) ( the -3 is the charge on the ion)'

    So can you use the shape of PO4 and add 3 electrons to your dot and cross diagram?
    If you need the shape then you don`t need to do a dot and cross diagram. As there are 4 sets of electrons around the central phosphorus it will have a tetrahedral shape with 109 degree bond angles (this is for the OCR B Salters sylabus)


    Note: There will be three single bonds to oxygen and one double bond.
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    (Original post by SamuelN98)
    If you need the shape then you don`t need to do a dot and cross diagram. As there are 4 sets of electrons around the central phosphorus it will have a tetrahedral shape with 109 degree bond angles (this is for the OCR B Salters sylabus)



    Note: There will be three single bonds to oxygen and one double bond.
    How did you know about the 1 double bond and 2 single?
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    Wouldn't be 6 pairs of electrons, 4 bonding pairs and 2 lone pairs? Here's my thought process:

    1/ Outer electrons of central atom P 5
    2/ Electrons brought by the Oxygens 4x1
    3/ Add 3 e- due to charge 12
    4/ Divide by 2 6

    Therefore wouldn't be a square planar?
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    (Original post by indignation)
    How did you know about the 1 double bond and 2 single?
    This should help explain it.
    http://terpconnect.umd.edu/~wbreslyn...for-PO43-.html
 
 
 
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