As a cake bakes, sodium bicarbonate reacts with acids in the cake. the bicarbonate ion and the anion in the acid change places to make carbonic acid. the carbonic acid then breaks down to produce carbon dioxide bubbles that make the cake rise. check all of the reactions that occurred.
check all reactions that occurred
combustion

decomposition

double replacement

synthesis

1) Answer is: double replacement.

Balanced chemical reaction: NaHCO₃ + HCl → NaCl + H₂CO₃.

Double replacement reactions (double displacement or metathesis reactions), two ionic compounds are exchanged, making two new compounds.

2) Answer is: decomposition.

Balanced chemical reaction: H₂CO₃ → H₂O + CO₂.

Decomposition is reaction where one substance is broken down into two or more simpler substances.

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.