Question 6:
Compounds such as alcohols and glucose also contain hydrogen but are not
categorized as acids. Describe an activity to prove it.
Answer
Two nails are fitted on a cork and are kept it in a 100 mL beaker. The nails are then
connected to the two terminals of a 6-volt battery through a bulb and a switch. Some
dilute HCl is poured in the beaker and the current is switched on. The same
experiment is then performed with glucose solution and alcohol solution.
Observations: It will be observed that the bulb glows in the HCl solution and does
not glow in the glucose solution.
Result:
HCl dissociates into H+ and Cl− ions. These ions conduct electricity in the solution
resulting in the glowing of the bulb. On the other hand, the glucose solution does not
dissociate into ions. Therefore, it does not conduct electricity.
Conclusion:
From this activity, it can be concluded that all acids contain hydrogen but not all
compounds containing hydrogen are acids. That is why, though alcohols and
glucose contain hydrogen, they are not categorised as acids.
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