Question
Explain the similarity and difference in two events, namely adding NaOH to water and adding CaO to water.
✓
Answer
| Adding NaOH to water | Adding CaO to water | |
| Similarity | Heat is given away during this process. So, it is an exothermic process. | Heat is given away during this reaction. So, it is an exothermic reaction. |
| Difference | No new substances are formed as the process involves only dissolution. The aqueous solution of NaOH is strong base. | New substance (calcium hydroxide) is formed which is less soluble and its aqueous solution is weak base. |
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