Question

Explain, why does a copper statue lose its beautiful luster on being kept in open for some months and a green layer is deposited over it.

Answer 1

A copper statue lose its beautiful luster on being kept in open for some months and a green layer is deposited over it due to moist air.

Copper statue is exposed to moist air for long it acquires a dull green coating .

The green material is a mixture of copper hydroxide (Cu(OH)2 and copper carbonate( CuCO3.)


(Moist air is H2O + CO2+O2)


The following is the balanced reaction:


2Cu + H2O + CO2 + O2 ----->(Cu(OH)2 + CuCO3


==================================================================================


Hope this will help you . .

Answer 2

heya!!

question -

Explain, why does a copper statue lose its beautiful luster on being kept in open for some months and a green layer is deposited over it.

answer -

A copper statue lose its beautiful luster on being kept in open for some months because of moisture and humidity in the atmosphere.

A copper metal on being exposed to open for some months, forms a green dull coating on its surface.

The green coating contains copper hydroxide, Cu ( OH ) 2 and copper carbonate Cu Co3 .

While the moisture contains hydrogen H2O, Carbon dioxide CO2 and O2 that's oxygen .

Thus the reaction takes place and gets balanced like the following -

2Cu + H2O + CO2 + O2 = Cu ( OH ) 2 + CuCo3

========================================================================

#hope it helps!!