Charges on the metal
MgSO4 = +2
NiSO4*6H2O = +2
CoCl2*6H2O = +2
KCr(SO4)2*12H2O = +3
CuSO4*5H2O = +2
(NH4)2Cr2O7 = +2
FeSO4*7H2O = +2
MnCl2*4H2O = +2
FeCl3*6H2O = +3
I'm not sure if the above answers are correct, could someone please check them over and let me know?
You missed two; Cr alum and (NH4)2Cr2O7.
KCr(SO4)2. I think they wanted BOTH K and Cr but those are not +3 anyway you stack it. K is +1, Cr is +3, and that balances the -2 each for sulfate for a total of -4.
For (NH4)2Cr2O7.
NH4 is +1 so two of them are +2.
O is -2 and seven of them are -14
Therefore, total Cr must be +12 (+12+2=14 which balances -14) so each Cr must be +6.
wow, those ones are confusing...
The charges on metals in these chemical compounds are determined by their oxidation states or valence states. These oxidation states represent the number of electrons gained or lost by the metal atom.
To determine the charges on the metals, you need to understand the valence electron configuration of each metal and the overall charge of the compound.
Here are the charges on the metals in the compounds you provided:
1. MgSO4: The charge on Mg is +2 because it loses two electrons to achieve a stable noble gas configuration.
2. NiSO4·6H2O: The charge on Ni is also +2 because it loses two electrons.
3. CoCl2·6H2O: The charge on Co is +2 because it loses two electrons.
4. KCr(SO4)2·12H2O: The charge on Cr is +3 because it loses three electrons, and K has a charge of +1.
5. CuSO4·5H2O: The charge on Cu is +2 because it loses two electrons.
6. (NH4)2Cr2O7: The charge on Cr is +6 because it loses six electrons, and NH4 has an overall charge of +2.
7. FeSO4·7H2O: The charge on Fe is +2 because it loses two electrons.
8. MnCl2·4H2O: The charge on Mn is +2 because it loses two electrons.
9. FeCl3·6H2O: The charge on Fe is +3 because it loses three electrons.
In general, the charge on a metal in a compound can be determined by checking its position on the periodic table, considering its valence electron configuration, and accounting for any gained or lost electrons to achieve a stable configuration. It is also important to consider the charges of other elements in the compound and their valence states.