Question

Compounds such as alcohols and glucose contain hydrogen but are not categorized as acids. Describe an activity to prove it. 

(OR) 

Write an activity to show that the solutions of compounds like alcohol and glucose do not show acidic character even though they are having Hydrogen. 

(OR) 

Write an activity which proves acids are good conductors of electricity. 

(OR) 

The acidity of acids is attributed to the H+ ions produced by them in solution explain the above statement with an activity. 

List out the material for the experiment to investigate whether all compounds containing Hydrogen are acids or not and write the experimental procedure.

Answer 1

List of the material required : 

1. Glucose 

2. Alcohol 

3. Dil. HCl 

4. Dil-H₂ SO₄ 

5. Beaker 

6. Connecting wires 

7. 230 voltage AC supply 

8. Bulb 

9. Graphite rods. 

Procedure : 

1. Prepare glucose, alcohol, hydrochloric acid and sulphuric acid solutions.

2. Connect two different coloured electrical wires to graphite rods separately as shown in figure. 

3. Connect free ends of the wire to 230 volts AC plug. 

4. Complete the circuit as shown in the figure by connecting a bulb to one of the wires. 

5. Now pour some dilute HCl in the beaker and switch on the current.

Observation : 

The bulb starts glowing. 

Repetition: 

Repeat activity with dilute sulphuric acid, glucose and alcohol solutions separately.

Observation: 

1. We will notice that the bulb glows only in acid solutions. 

2. But the bulb does not glow in glucose and alcohol solutions. 

Result: 

1. Glowing of bulb indicates that there is flow of electric current through the solution. 

2. Acid solutions have ions and the movement of these ions in solution helps for flow of electric current through the solution.

Conclusion : 

1. The positive ion (cation) present in HCl solution is H⁺

2. This suggests that acids produce hydrogen ions H⁺ in solution, which are, responsible for their acidic properties.

3. In glucose and alcohol solution the bulb did not glow indicating the absence of H⁺ ions in these solutions. 

4. The acidity of acids is attributed to the H⁺ ions produced by them in solutions.