Question

this lab question is: how can you distinguish a physical change from a chemical change? which statements below are an appropriate hypothesis in response to this question? check all that apply. if a substance changes state of matter (e.g., liquid to gas), then this is a physical change because original properties of the substance have not changed. if a substance undergoes a physical change, then it will retain most of its original properties because no new substance is formed. if a substance undergoes a chemical change, then it will not retain its original properties because new substance is formed. if a precipitate is formed when two substances are mixed, then a chemical change has taken place because precipitates are new substances. done

Explanation:

A physical change involves a change in state or form without altering the substance's chemical identity, retaining original properties. A chemical change results in the formation of a new substance with different properties. Precipitate - formation is a sign of a chemical change as new substances are created.

Answer:

All of the statements are appropriate hypotheses.

1. If a substance changes state of matter (e.g., liquid to gas), then this is a physical change because original properties of the substance have not changed.
2. If a substance undergoes a physical change, then it will retain most of its original properties because no new substance is formed.
3. If a substance undergoes a chemical change, then it will not retain its original properties because a new substance is formed.
4. If a precipitate is formed when two substances are mixed, then a chemical change has taken place because precipitates are new substances.