How Might You Tell Whether or Not Your Toothpaste Contained

question 4

Multiple Choice

How might you tell whether or not your toothpaste contained either calcium carbonate, CaCO₃, or baking soda, NaHCO₃, 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

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