Question

examine the chemical equation. which indicator(s) of a chemical change is/are present in the equation?
na₂co₃ (s) + hcl (aq) → h₂o (g) + nacl (aq) + co₂ (g)
color change
formation of water
formation of a precipitate
formation of a gas

Explanation:

• Formation of water: In the given chemical equation \(Na_2CO_3(s)+HCl(aq)\to H_2O(g)+NaCl(aq)+CO_2(g)\), \(H_2O\) (water) is one of the products formed.
• Formation of a gas: \(CO_2\) (carbon - dioxide) is a gaseous product in the reaction. There is no color change indicated in the reactants and products (all reactants and products are either colorless or the color change is not a prominent feature here compared to the formation of substances). Also, there is no formation of a precipitate (all the non - gaseous products \(NaCl\) is in aqueous form).

Answer:

Formation of water, Formation of a gas