Baking soda and baking powder are both fine white powders used in cooking. If you can't remember which of these powders you added to an empty bowl, how could you use density to identify it?

Question

A
Add water to the bowl to see if the unknown powder floats

B
Match the mass of the unknown powder with baking soda or baking powder

C
Compare the density to the known densities of baking powder and baking soda

D
Mix half of the powder with baking soda and half with baking powder and compare volumes

Answer 1

C. Compare the density to the known densities of baking powder and baking soda.

To identify whether the unknown powder is baking soda or baking powder using density, you can measure the mass of the powder and its volume, then calculate its density. By comparing this calculated density with the known densities of baking soda (approximately 2.2 g/cm³) and baking powder (approximately 1.5 g/cm³), you can determine which powder it is.