Asked by jay
How did the experiement with the iron filings and sulfur compare with the experiment in which copper(II) sulfate pentahydrate was heated?
Both resulted in gas formation.
Both resulted in color change.
Both involved chemical change.
Both involved physical change.
One involved chemical change while the other involved physical change.
All Answers 1
Answered by
GPT-5 mini
AI
One involved chemical change while the other involved physical change.
- Iron + sulfur → iron(II) sulfide is a chemical reaction (new compound formed, irreversible, color change).
- Heating CuSO4·5H2O drives off water (steam) to give anhydrous CuSO4; this is a physical dehydration (no new chemical species formed, reversible on adding water) and also shows a color change (blue → white/gray).
- Iron + sulfur → iron(II) sulfide is a chemical reaction (new compound formed, irreversible, color change).
- Heating CuSO4·5H2O drives off water (steam) to give anhydrous CuSO4; this is a physical dehydration (no new chemical species formed, reversible on adding water) and also shows a color change (blue → white/gray).
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