Question

Verdigris is:
A) Basic copper acetate
B) Basic lead acetate
C) Basic lead
D) None

Answer 1

We must remember that the verdigris is a generally used term for green pigment.We need to know that it is formed by the reaction between the acetic acid and copper plates. Sometimes naturally it forms in the copper alloy in moisture. This word of Verdigris has come from the French word. In French Verdigris means (vert-de-gris) the color of greyish green.

Complete step by step answer:
We must need to know that the verdigris is prepared in the laboratory like hanging of copper plates over hot vinegar is sealed. During this reaction, acetic acid in vinegar reacts with copper plates and forms copper oxide. This copper oxide observed moisture and formed copper hydroxide. The acetate anion is also reacted with copper from copper acetate. Copper hydroxide and copper acetate combined to form one new molecule. This molecule is popularly known as Verdigris.
We can write the chemical equation for this chemical reaction of the formation of Verdigris as,
$2Cu + 2C{H_3}COOH + {O_2} \to Cu{\left( {C{H_3}COO} \right)_2}.Cu{\left( {OH} \right)_2}$
Therefore, the chemical formula of Verdigris is $Cu{\left( {C{H_3}COO} \right)_2}.Cu{\left( {OH} \right)_2}$
Verdigris is basically in the form of basic copper acetate.

So, the correct answer is Option A.

Note: We need to remember that the verdigris is used to painting in statues. This painting is never fading in color because after painting it is sealing with varnish to avoid discoloration and oxidation of copper. It is also used in dying in clothes. As we know that the main uses of this Verdigris in the manufacture of insecticide and fungicides. It has catalytic properties, hence it is used as a catalyst in some important organic reactions. This Verdigris is also used as medicine.