Question

1. a student kept a notebook during an investigation. which recorded observation was most likely a physical change? the color of two mixed solutions changed from clear to white. two solutions were mixed and the resulting solution felt hot. a solid formed when two liquids were mixed together. the solution was heated for two minutes until it boiled.

Explanation:

A physical change is a change in the form or physical properties of a substance without a change in its chemical composition. Changing the color of a solution (from clear to white) is a physical - property change and is likely a physical change. Mixing two solutions to form a solid is a chemical reaction (precipitation). Heating a solution to boiling can be a physical change, but the formation of a solid when two liquids are mixed is more indicative of a chemical change. Heating a solution to boiling is a phase - change (liquid to gas) which is a physical change, but the color - change option is a more straightforward example of a physical change in this context.

Answer:

The color of two mixed solutions changed from clear to white.