Answer to Question #267206 in General Chemistry for Allessandria

Question #267206

10.0 g H2O reacts with 4.5 g Na to produce NaOH and H2. Identify the excess reactant.

Expert's answer

We have to write the equation first

2Na + 2H2O -------- 2NaOH + H2

If 46g of Na react with 36g of H2O

4.5g of Na react with Xg of H2O

X=3.5g

Therefore H2O is the excess reactant.

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