Baking soda has a ph of 9. any # that has less than 7 as a ph is acid, any number that has a ph of 7 is neutral, and any number with a ph greater than seven is a base. so baking soda is not an acid but a base.
Answer:it reacts chemically to produce heat and gas with rapid expansion of matter. It is a rapid chemical reaction
Explanation:
This doesn’t seem like the full question
Endothermic is a chemical change in which heat is taken in (or absorbed).
<It starts out cold and later gets warmer>
Exothermic is a chemical change in which heat is released.
<It starts out hot, but gets cooler>