Part 2. Gas Formation Reactions. (A) Sodium arbonate Molecoulur Equation: \( \mathrm{Na}_{2} \mathrm{CO}_{3}+2 \mathrm{HCl} \rightarrow 2 \mathrm{NaCl}+\mathrm{H}_{2} \mathrm{O}+\mathrm{CO}_{2} \) Nenic Equation: Net Ionic Equation \( \mathrm{CO}^{2-}+2 \mathrm{H}^{+} \rightarrow \mathrm{H}_{2} \mathrm{O}+\mathrm{CO}_{2} \)

Did you know that the reaction of sodium carbonate with hydrochloric acid is a classic example of an acid-base reaction that produces carbon dioxide gas? The fizzing and bubbling you see are due to the release of \( \mathrm{CO}_{2} \) when \( \mathrm{HCl} \) reacts with \( \mathrm{Na}_{2} \mathrm{CO}_{3} \). This reaction showcases a fun chemistry principle: the formation of a gas can often be observed as bubbles in a solution, and it’s a great way to engage students in learning about chemical reactions! In practical terms, this reaction is not just an experiment confined to the classroom. It has real-world applications in areas like baking, where sodium carbonate can be used as a leavening agent. The release of carbon dioxide helps dough rise, giving baked goods their fluffy and airy texture. So next time you're enjoying a homemade cake, remember that this familiar reaction may have played a crucial role in creating that delicious treat!