Chapter 2: Acids, Bases and Salts

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Acids,Bases, and Salts

Question:

Compounds such as alcohol and glucose also contain hydrogen but are not categorised as acids. Describe an activity to prove it.

Answer:

The hydrogen ion is common in all acid while the hydroxide is present in all bases. The aqueous solution of an acid and base will conduct electricity. This is because acid and base dissociate into ions when dissolved in water. The movement of these dissociated ions is responsible for the conduction of current. Hydrochloric acid is a strong electrolyte that dissociates easily to release hydrogen ions. While solutions like, alcohol and glucose are non-electrolytes that does not dissociate to form free hydrogen ions.

The above diagram shows the activity in which 5mL of each hydrochloric acid, ethanol and glucose are taken in a separate beaker. Each beaker contains iron nail that is connected to the battery and an electric bulb. The bulb will glow in a beaker containing hydrochloric acid while the bulb will not glow in a beaker containing ethanol and glucose.


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