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    do they usually ask group 4 equations...as in tin n lead ones

    or can i get away with not learning it
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    Its risky...i don't know them particularly well but gonna have another go now. They haven't come up in any of the past exam papers i have done...which may mean they are more likely to come up now! I think they will probably just ask you to show the formation of an oxide (easy, since they are all MO2), then ask whether it is acidic or basic, then ask you to give an equation to illustrate this - ge to pb are all amphoteric oxides.
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    i dnt think u have to knw tin equations...
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    You need to know lead oxide is amphoteric and show this using equations. You just need to know that the +2 oxidation state is more stable down group.
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    isnt it the 4+ gets more stable dwn the gr....therefore lead 4 is more stable
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    i thought +2 is more stable than +4
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    +2 becomes more stable down the group, +4 less stable (due to the inert pair effect - the promotion (excitation) of s electrons to the p orbitals requires energy and this only occurs if the energy can be repaid by the formation of a covalent bond. In tin it can, but in lead the bond energies are too small).
 
 
 
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