Unformatted text preview: c. A solid formed. It is insoluble. d. The change involved a change in the appearance of the substance, but it did not change its chemical composition. 3. a. Physical change Water vapor (gas state) comes in contact with the cooler glass surface and releases energy to the glass. As it loses energy, it changes from the gas to the liquid state and turns into water droplets. This is a change in the state of matter (phase change), the chemical composition is not changed. b. Chemical change The addition of the lemon juice (acidic) causes a reaction with the substance responsible for the color of the tea. c. Physical change The addition of water dilutes the tea, so the observed color change is due to a change in concentration, not a chemical reaction....
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- Fall '07
- Chemistry, Chemical reaction, Chemical substance