correct mole ration the substance
sodium to water in the reaction: Na + H2O ==> H2 + NaOH
Na + H2O ==> H2 + NaOH
For this equation, the H:O ratio has to be 2:1 on both sides because of H2O.
To achieve this, H2:NaOH has to be 1:2 on the right side.
So assume the number of H2 is 1, then the number of NaOH will be 2, by which there will be 2Na, 4H, and 2O on the right side.
So for the left side, there should also be 2Na, 4H, and 2O to reach balance, which will lead to 2Na and 2H2O.
Therefore the final equation after balancing the mole ratio will be
2Na + 2H2O ==> H2 + 2NaOH
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