Question

solid calcium oxide was taken in a container and water was added slowly to it.[1]state the two observation made in the experiment.[2]write the name and chemical formula of the product formed.

Answer 1

Answer:

i) Calcium oxide (CaO) reacts vigorously with water to form slaked lime.

The container becomes hot because a large amount of heat is released during this reaction.

(ii) The product formed is slaked lime for which the chemical formula is Ca(OH)2

Answer 2

Answer:

Experiment:

Given:

Solid calcium oxide is added to a container and water is added to it.

Observation of the experiment:

1) When calcium oxide reacts with water, there will be vigorous reactions.

2) The reaction formed is exothermic in nature.

3) Then there will be a hissing sound produced.

4) The solution then starts boiling.

Calcium hydroxide is the chemical formed when calcium oxide reacts with water.

The chemical equation formed is

$\mathrm{CaO}+\mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{CaOH}_{2}$