Question

How can you tell if a sample contains baking soda and cornstarch or baking powder?

Answer 1

To find out if a sample has baking soda we can add vinegar.

Step-by-step explanation:

When vinegar (acetic acid) is mixed with salt (sodium bicarbonate), water, carbon dioxide and sodium acetate are formed. We see the formation of bubbles (which is carbon dioxide, which is a gas).