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Question
on adding dilute HCL to copper oxide powder the solution formed is blue- green . predict the new compund formed which imparts a blue - green colour to the solution .
on adding dilute HCL to copper oxide powder the solution formed is blue- green . predict the new compund formed which imparts a blue - green colour to the solution .
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Solution
CuO when reacts with dil. HCl it form CuCl2. The reaction can be written as follows:
CuO(s) + 2HCl(aq) --> CuCl2(aq) + H2O(l)
Actually the colour is not due to CuCl. The blue colur is due to the formation of complex ion of copper with water molecules.[Cu(H2O)6]2+. When copper form complex with chloride ion it gives yellow colour [CuCl4]2-, If there is a mixture of [Cu(H2O)6]2+ and [CuCl4]2-It gives green colur to the solution.
CuO when reacts with dil. HCl it form CuCl2. The reaction can be written as follows:
CuO(s) + 2HCl(aq) --> CuCl2(aq) + H2O(l)
Actually the colour is not due to CuCl. The blue colur is due to the formation of complex ion of copper with water molecules.[Cu(H2O)6]2+. When copper form complex with chloride ion it gives yellow colour [CuCl4]2-, If there is a mixture of [Cu(H2O)6]2+ and [CuCl4]2-It gives green colur to the solution.
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