How Might You Tell Whether or Not Your Toothpaste Contained

Multiple Choice

How might you tell whether or not your toothpaste contained either calcium carbonate, CaC O₃, or baking soda, NaHC O₃, without looking at the ingredients label?

A) if the toothpaste bubbles when heated
B) if the toothpaste bubbles when added to ammonia, such as window cleaner
C) if the toothpaste produces a salt (NaCl) when added to HCl
D) if the toothpaste bubbles when added to vinegar