Blue Crystals: Chemical or Physical Changes?
Are the changes described in the data chemical or physical changes?
Blue crystals are mixed with water, resulting in a clear blue liquid with a white powder at the bottom. After heating, only blue crystals remain. Is this a chemical change or a physical one?
Answer:
The changes described in the question are physical changes rather than chemical changes.
Explanation: Based on the given information, we can analyze the changes that occur:
1. Blue crystals mixed with water:When the blue crystals are mixed with water, a clear blue liquid is formed with a white powder at the bottom. This change in appearance indicates a physical change where the state of the substances has altered, but no new substances with different properties have been created.
2. Heating the mixture:Upon heating the mixture, only the blue crystals remain. This observation further supports the idea that the changes are physical in nature, as the original substance (blue crystals) is recovered without undergoing a chemical transformation.
Therefore, the mixing of blue crystals with water and the subsequent heating represent physical changes that affect the physical state and appearance of the substances involved, without leading to the formation of new substances with distinct properties.