Question

9. The equation Na + H2O → NaOH + H, is
a. correct.
b. incorrect since it is not balanced.
c. incorrect since sodium does not react with water.
d. incorrect since hydrogen should be written as H and not HZ.​

Answer 1

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Here's your Answer

Answer:

Option B. Incorrect since it is not balanced

Explanation:

Assuming that you're supposed to balance this chemical equation by inspection. You could also balance it by using oxidation numbers, but that's not you're supposed to go that for here.

Your unbalanced chemical equation looks like this

Na + H2O → NaOH + H

You have 3 atoms of hydrogen on the products' side, but only 2 on the reactants' side.

You may multiply the sodium hydroxide by to get a total of 4 atoms of hydrogen on the products' side.

This will allow you to simply double the number of water molecules to get 4 atoms of hydrogen on the reactants' side.

So you now have

Balance the atoms of sodium by multiplying sodium metal by 2

Check to see if the atoms of oxygen are balanced.

2 atoms of hydrogen on the reactants' side and 2 on the products' side, which means that the equation is balanced.

Balanced equation: 2Na+2H2O→2NaOH+H2

Answer 2

Answer:

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