Question

“is” questions: part 2

1. what did you notice when the sodium carbonate was added to the hydrochloric acid?

Explanation:

When sodium carbonate is added to hydrochloric acid, a chemical reaction occurs. Carbon dioxide gas is produced, which can be observed as effervescence (bubbling). There may also be a change in temperature due to the exothermic nature of the reaction.

Answer:

Effervescence (bubbling) may be observed due to the production of carbon dioxide gas, and there may be a temperature - change as the reaction is exothermic.