Take 56 g calcium oxide in a large conical flask and put 18 g water in

1.	Take 56 g calcium oxide in a large conical flask and put 18 g water in it. Observe what happens. Measure the mass of the substance formed. What similarity do you find? Write your inference.
Answer» (i) When 18 g of water is added to 56 g of calcium oxide, calcium oxide combines with water to form calcium hydroxide Ca(OH)₂ (ii) The mass of calcium hydroxide formed is 74 g. (iii) In this activity the total mass of reactants, Calcium oxide + Water = 56 g +18 g = 74 g. It is equal to the mass of the product formed. Ca(OH)₂ = 74g. This activity verifies the Law of Conservation of Matter, i.e., in a chemical reaction, the total weight of the reactants is same as the total weight of the products formed due to the chemical reactions.

Take 56 g calcium oxide in a large conical flask and put 18 g water in it. Observe what happens. Measure the mass of the substance formed. What similarity do you find? Write your inference.

Answer»

(i) When 18 g of water is added to 56 g of calcium oxide, calcium oxide combines with water to form calcium hydroxide Ca(OH)₂

(ii) The mass of calcium hydroxide formed is 74 g.

(iii) In this activity the total mass of reactants, Calcium oxide + Water = 56 g +18 g = 74 g.

It is equal to the mass of the product formed. Ca(OH)₂ = 74g.

This activity verifies the Law of Conservation of Matter, i.e., in a chemical reaction, the total weight of the reactants is same as the total weight of the products formed due to the chemical reactions.

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