Monday, October 11, 2021

Metals and Non-metals | Class 10 | Activity 3.8 with solution

Metals and Non-metals | Activities in Text Book with Solution

Activity 3.8 

Take a magnesium ribbon and some sulphur powder.

Burn the magnesium ribbon. Collect the ashes formed and dissolve them in water.

Test the resultant solution with both red and blue litmus paper.

Is the product formed on burning magnesium acidic or basic?
  • ✅ Answer: Basic. Mg(OH)2
Now burn Sulphur powder. Place a test tube over the burningsulphur to collect the fumes produced.

Add some water to the above test tube and shake.

Test this solution with blue and red litmus paper.

Is the product formed on burning Sulphur acidic or basic?
  • ✅ Answer: Acidic. Sulphurous acid (H2SO3).
Can you write equations for these reactions?
  • ✅ Answer:

2Mg(s) + O2(g) → 2MgO(s)

MgO(S) + H2O(l) → Mg(OH)2 (aq)

S(s) + O2(g) → SO2(g)

SO2(g) + H2O(l) → H2SO3 (aq)

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