How can you tell if white powder is baking soda or cornstarch?

1. The "Fizz" Test:

* Baking soda (sodium bicarbonate): Reacts with acids, producing bubbles (carbon dioxide). Add a small amount of powder to a tablespoon of vinegar. If it fizzes and bubbles, it's likely baking soda.

* Cornstarch: Won't react with vinegar. The powder will simply stay in the vinegar, maybe becoming slightly cloudy.

2. The "Touch" Test (Caution: Use sparingly):

* Baking soda: Feels slightly gritty or grainy.

* Cornstarch: Feels smooth and powdery.

3. The "Water" Test:

* Baking soda: Dissolves in water.

* Cornstarch: Doesn't dissolve in water. It will form a milky suspension.

4. The "Heat" Test:

* Baking soda: When heated, it will decompose and release carbon dioxide gas. You'll notice it becoming "flat" and shrinking.

* Cornstarch: When heated, it will become slightly yellowed and solidify.

Important Note: It's always best to err on the side of caution. If you're unsure, don't use the powder for cooking or baking.

Let me know if you have any other questions.