Question

When compound X reacts with water to form compound Y which is used in white

washing. Identify compound X & Y. Support your answer with the help of an equation.​

Answer 1

Explanation:

When Compound X reacts with water to form compound Y. Compound Y is used in white washing.

X + H2O -> Y

CaO + H2O -> Ca(OH)2

Hence,

X is Calcium oxide(CaO)

Y is Slaked lime [Ca(OH)2]

Additional information -

• Calcium oxide is also known as Quick lime.
• Calcium hydroxide is also known as slaked lime.
• Calcium hydroxide is used for white washing.
• When CO2 is passed over Ca(OH)2 then Calcium carbonate is formed and water is released.

Reaction -

Ca(OH)2 -> CaCO3 + H2O

• This is an example of combination reaction.