Is the following chemical equation balanced?

2na + 2h2o ⇒ 2naoh + h2

yes
no

Given information:

2Na + 2H2O → 2NaOH + H2

To determine:

If the above equation is balanced

Explanation:

For an equation to be balanced the number of atoms on the reactants must be equal to the number of atoms on the products

For the given reaction:

Reactants                            Products

Na = 2 atoms                       Na = 2 atoms

H = 4 atoms                          H = 4 atoms

O = 2 atoms                          O = 2 atoms

Ans: Since there are equal number of Na, H and O atoms on the reactant and product side, the equation is balanced.

answer: - 3.) the oxidation state of nitrogen in no changes from +2 to 0, and the oxidation state of carbon in co changes from +2 to +4 as the reaction proceeds.

solution: - as per the rules, oxidation number of oxygen in its compounds is -2. the sum of oxidation numbers of all the elements of a molecule or compound is zero.

also, the oxidation number in elemental form is zero.

in no, the oxidation number of o is -2 so the oxidation number of n is +2 so that the sum is zero.

similarly, the oxidation number of c in co is +2 and o is -2.

on product side the oxidation number of n is 0 as it is in the elemental form() .

oxidation number of c in carbon dioxide is +4 as there are two oxygen in it and we know that each oxygen is -2.

so, oxidation number of n is changing from +2 to 0 and the oxidation number of c is changing from +2 to +4.

since nitrogen is reduced and hence no is acting as an oxidizing agent. carbon is oxidized and so co is acting as a reducing agent.

so, the right choice is number 3.)the oxidation state of nitrogen in no changes from +2 to 0, and the oxidation state of carbon in co changes from +2 to +4 as the reaction proceeds.