Bluish, something like its Sulfate
Rb2SeO4
Na2SeO4
Formula: Cs2SeO4
Copper has two oxides. Copper (I) oxide is red, while Copper (II) oxide is black.
Articles made of gold may be plated with copper ( copper electroplating ). The article will look like copper .
max absorption wavelength of sodium selenate solution and colour
This is the ortho-tellurate ion. TeO42-
No
Selenate
H2SeO4
Inorganic
Rb2SeO4
Na2SeO4
The metal that will destroy the blue colour of Copper ions is any metal above copper in the reactivity series, such as calcium.
The colour of Copper sulphate is blue because Copper ions absorb light in all frequencies except blue which is reflected instead.
Copper gives off a bluish colour
Selenate(II)