Question

Juny lie Tollowing as elements and compounds: water, nitrogen, carbon, hydrogen chlume,
magnesium, aluminium oxide, calcium carbonate.
5. What are the two essential conditions for rusting? How does oiling of iron objects prevent rusting?
6. Why does the cut surface of brinjal turn brown?
V. What are crystals? How can the crystals of sodium chloride be prepared from common salt?​

Answer 1

Explanation:

Sodium carbonate + Ethanoic acid → Sodium ethanoate + Carbon dioxide + Water

5.3 g + 6 g → 8.2 g + 2.2 g + 0.9 g

LHS RHS

11.3 g = 11.3 g

(Mass of reactant) (Mass of product)

This shows, that during a chemical reaction