c) What happens when the following substances are mixed with water? Are the changes reversible or irreversible? Give reasons for your answers.
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Substance A was mixed with water then it will give irreversible change while the substance B was mixed with water then it will give a reversible change
Explanation:
- Reversible change: Reversible change is such type of change which can be reversed and undone once initiated to return to its original form.
- Irreversible change: Irreversible change is such type of change which cannot be reversed once initiated to return to its original form.
- Substance A was mixed with water then it will give irreversible change.
- Reason: Once the mixture hardens upon mixing substance A with water then a hard mass sets and will not return to its original form as in case of mixing plaster of paris with water.
- Substance B was mixed with water then it will give a reversible change.
- Reason: It is a reversible change because after mixing a solution will formed which can be reversed or separated to obtain its original form.
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