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Basic Solutions

Posted: Sun Jan 31, 2016 7:59 pm
by 504594108
Which do you try to balance first, the Oxygen or the Hydrogen? I feel like everytime I get the Oxygen right, the hydrogen gets messed up in the process and I can never seem to get the equation balanced.

Re: Basic Solutions

Posted: Sun Jan 31, 2016 10:36 pm
by Cesar Martinez 2A
Definitely balance the oxygen first. After that, balance the hydrogen by putting H2O on the other side and the same amount of OH on the side opposite of that. For example:

O3 -> O2 Original equation.
O3 -> O2 + (H2O) This balances the oxygen on both sides.
(2 H2O) + O3 -> O2 + H2O +(2 OH-) Balance the hydrogen by placing 2 H2O on the left side. In doing so, you place the same amount of OH- on the right side to balance out the oxygen from the H2O you used.
(2e-) + H2O + O3 -> O2 + 2 OH- Balance the charges by adding electrons.

In this case, you must use 2 water molecules in the third step because if you were to use only 1, the hydrogen would not be balanced.