Balancing and naming equations

Naming formulas
We know its been a while but here is a small review for naming those formulas.
ionic compounds...
They are always metal and a non-metal.
Ex. NaCl
      Na as a charge of +1
      Cl has a charge of -1
The cross over method is quite effective
      Na1Cl1
     Now reduce
      NaCl

Ex. Fe2O3
      Iron is a multivalent compound (Fe can either combine as 2+ or 3+)
      Uncross the the subscripts
      Fe^3
      O^2
      We know oxygen has a charge of -2 (so 2 and 3 are not reduced numbers) so we are using the charge 3+
      Iron oxide
      However, we need to specify which form of iron we are using; for that, we must use roman numerals.
      So it would be named: Iron (III) oxide.

covalent formulas....
Theses are quite easy to name as you literally name as you see it.  However, because the people who chose how these formulas should be named wanted to make our lives difficult, they used Greek.


Ex. CO2
  That is simply telling you that the compound has 1 carbon 2 oxygen.

So to name it, you would write
                           monocarbon dioxide.
HOWEVER, just to confuse you more.  There is a general rule.  You are never to use mono on the first element (even if it has only one atom).  You only use mono if
the second element has 1 (for ex. CO = Carbon monoxide)

So CO2 would be written as Carbon dioxide.


Balancing Equations


Here is a basic tutorial on how to balance equations

Here is a fill in the blanks sheet to practice balancing of equations.  At the end, check your answers!

Gapfill exersice