cheers.
Doing this one now:
KIO3 + HCl + KI -> I2 + H2O + KCl
Not sure about KIO3.
On the right hand side I said I was 0, H2 was +2, O was -2, K was +1 and Cl was -1.
On the left hand side I said that K was +1, I was -1, H was+1 and Cl was -1.
I didn't really know how to deal with KIO3. I figured it had a -6 charge and so I went with O3 being -6, K being +1 and I being -1.
The problem is that the only ox number that changes is I, from -1 to 0.