Question

On adding dilute HCl to Copper oxide powder, the solution formed is blue green.Predict the new compound formed which imparts blue green colour to the solution.

Answer 1

When HCl reacts with copper oxide, a blue green solution of copper (II) chloride is formed. The reaction is as follows:

                 HCl        +    CuO -------->   CuCl2  +  H2O
                      (aq)              (s)                    (aq)         (l)

This is a double replacement reaction. The soluble Copper(II)Chloride is blue-green in color and is responsible for the color of the solution formed.

Answer 2

Answer:

When HCl reacts with copper oxide, a blue green solution of copper (II) chloride is formed.

                2HCl        +    CuO -------->   CuCl2  +  H2O

                     (aqueous)              (solid)                    (aqueous)         (liquid)

This is a double replacement reaction. The soluble Copper(II)Chloride is blue-green in color and is responsible for the color of the solution formed.