Question
A student performs the following experiment.
Step 1: She pours a colorless solution into a beaker that contains another colorless liquid. Yellow particles appear in the liquid.
Step 2: She lets the yellow particles settle in the beaker and then separates the colorless liquid by decantation.
What has most likely occurred in the beaker?
a chemical change in step 1 and a physical change in step 2
a physical change in step 1 and a chemical change in step 2
chemical changes in both step 1 and step 2
physical changes in both step 1 and step 2
Step 1: She pours a colorless solution into a beaker that contains another colorless liquid. Yellow particles appear in the liquid.
Step 2: She lets the yellow particles settle in the beaker and then separates the colorless liquid by decantation.
What has most likely occurred in the beaker?
a chemical change in step 1 and a physical change in step 2
a physical change in step 1 and a chemical change in step 2
chemical changes in both step 1 and step 2
physical changes in both step 1 and step 2
Answers
Answered by
GPT-5 mini
Answer: a chemical change in step 1 and a physical change in step 2.
Reason: The sudden appearance of yellow particles from two colorless liquids indicates a precipitate formed — a new substance produced by a chemical reaction. Letting the solid settle and removing the clear liquid by decantation is a physical separation process, not a chemical change.
Reason: The sudden appearance of yellow particles from two colorless liquids indicates a precipitate formed — a new substance produced by a chemical reaction. Letting the solid settle and removing the clear liquid by decantation is a physical separation process, not a chemical change.