MulderMan Posted January 25, 2005 Share Posted January 25, 2005 never got my head around balancing equations:mad:. is this right to start? Mg + HCl --> MgCl2 + H2 then attempt at balancing... Mg + 2HCl --> MgCl2 + H2 Link to comment Share on other sites More sharing options...
Dhawal Posted January 25, 2005 Share Posted January 25, 2005 Ya BTW if you know Oxidation nos. then its a hell lot easy job ! Link to comment Share on other sites More sharing options...
ed84c Posted January 25, 2005 Share Posted January 25, 2005 well to put it simply, you need to look at the group each chemical is in. This will tell you (for lighter elements) how many gaps there are in the outer shell. So eg. We look at Magnesium oxide. We know that Magnesium has 2 spare electrons (in group 2) and we want to make 8 electrons. If Oxygen has 6, then we use the one atom of oxygen eg. Sodium. This has one spare electron, and There is 2 in oxygen, so to make it more stable we need another electron. We can use the 1 electron in hydrodgen to make NaOH Link to comment Share on other sites More sharing options...
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