Question

Describe an activity to show that non-metal oxides are acidic in nature. ​

Answer 1

Answer:

Take a magnesium ribbon. burn this magnesium ribbon in air. collect the ash dissolve the ash in water then dip a red litmus paper in the solution. The red litmus turns into blue color. this indicates the solution is basic nature. In the above experiment Magnesium is a metal. after burning in air it forms MgO (ash).Magnesium oxides on dissolving in water forms a basic solution called magnesium hydroxide. 2Mg+O2 →2MgO +2H2O →2Mg(OH)2 Non metallic oxides are acidic nature. Dissolve sulphur dioxide gas in water. test this solution with blue litmus. the litmus changes into red color. Indicates the solution is acidic in nature.

SO2 + H2O →H2SO3

⭕⭕ Hope it helps ⭕⭕

Answer 2

Aim of the experiment -

To show that non metals react with oxygen to form non metallic oxides which are acidic in nature.

Materials required -

Charcoal, deflagrating spoon, glass jar, lid, blue litmus paper, watch glass.

Procedure -

1. Small piece of charcoal was taken in a deflagrating spoon and it was ignited.
2. The spoon was put in a glass jar and was covered by a lid.
3. After sometime, the spoon was removed from the jar.
4. Water was added in the jar and it was covered.
5. The contents were mixed by shaking them properly.
6. The solution was poured in a watch glass.
7. The blue litmus paper was dipped in it.

Observation -

The blue litmus paper turned into red.

Conclusion -

The solution is acidic. The charcoal (carbon) burn in presence of oxygen to form Carbon Dioxide gas that get dissolved in watercto form an acid called carbonic acid.

$\bf {C(s) + O_{2}(g) \implies CO_{2}(g)} \\Charcoal + Oxygen \implies Carbon Dioxide \\ \\ CO_{2}(g) + H_{2}O(l) \implies H_{2}CO_{3}(aq) \\Carbon Dioxide + Water \implies Carbonic Acid$

Precautions -

Keep your hands safe from the solution during the experiment.