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    Please can someone help in how to balance equations as I just don't get it?! How do you know which one to balance first and etc...


    Consider the equation: Na + H2O → NaOH + H2.
    Find the current imbalance - there are 2 hydrogens on the left side and 3 on the right. Therefore you should increase the number of hydrogen ions on the left side: Na+2H2O→NaOH + H2. After doing this you find that there are now 2 oxygens and 4 hydrogens on the left side and 1 oxygen and 3 hydrogens on the right side => you need increase the right side by one of each. You can see that it's possible if you make it Na+2H2O→2NaOH + H2, although this makes the sodium unbalanced. However this can easily be solved by doubling the sodium on the left side to make it 2Na+2H2O→2NaOH + H2, which is finally balanced. Overall, it's simply increasing the unbalanced coefficients on either side until the equation becomes balanced. It would be helpful if you gave some examples if you're still finding it a bit difficult.

    (Original post by Alicezworld)
    Please can someone help in how to balance equations as I just don't get it?! How do you know which one to balance first and etc...

    Look for SO4 or CO3 or other polyatomic ions and balance them first
    Usually do H and O last. This made it easier for me.
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