Sodium bicarbonate is used to neutralize the remaining HCl at the end of the reaction. The initial products of this reaction are carbonic acid and sodium chloride. Carbonic acid then decomposes into carbon dioxide and water. Write a balanced chemical equation for each of these processes using Lewis structures (no molecular formulas).

Kindly check explanation section.

Explanation:

Since, the question requires the chemical reaction to be written in lewis for the the processes involved in this particular Question/problem that is to say the neutralization process and the decomposition process. The lewis structure is given in the attached picture.

For the first process; Sodium bicarbonate reacts with HCl to produce the carbonic acid and a salt, known as Sodium chloride.

Na2CO3 + 2HCl ----------> 2NaCl + H2CO3.

The second process shows the decomposition of Carbonic acid into carbon dioxide and water.

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.