SC-674
Evaporation and crystallisation
Lower Sec Science · Secondary 1 · Hard · Evaporation and crystallisation
A 50 cm³ salt solution is placed in an evaporating dish and heated gently until all the water has boiled away, leaving dry salt. Which statement best describes what has happened to the salt during this process?
- Only the water evaporates, leaving the salt behind as a solid.
- The salt decomposes into simpler substances when heated.
- Both water and salt evaporate at the same time.
- The salt changes into a gas and then condenses back to a solid.
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