Question

Explain: (a) Zn2+ salts are white while Cu2+ salts are blue (b) Cu+
salts are white while as

Cu2+ salts are blue ​

Answer 1

Answer:

hey mate

Explanation:

n case of Zn fully filled d orbital is present therefore no d-d transition can be possible in this case and it is colorless. In case of copper because of d-d transition electrons emits light in the visible range and hence they are colored compounds.

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Answer 2

Answer:

(i) Zinc and copper are transition metals and their ions are generally coloured due to d-d transition of unpaired electron.

But in case of Zn 2+3d is completely filled and no unpaired electrons are available for transition. So light falling on these ions gets completely transmitted and their salts appear white. How ever ion Cu2+3d has 9 electrons. The unpaired electron absorbs particular wavelengths in visible region of light and the transmitted light shows the complementary colour 'blue'.