What is the color of #Cu^(2+)# in solution? What is the color of glucose in solution? What the color and formula are of copper (l) oxide?

1 Answer
anor277
Jan 26, 2017

The #"cupric ion"# has a truly beautiful blue colour in aqueous solution.....

Explanation:

#[Cu(OH_2)_6]^(2+)# gives a blue coloured solution in water:

https://tse4.mm.bing.net/th?id=OIP.6dvoTueAL8mcvamyGL0e-QDIEM&pid=15.1&P=0&w=300&h=300

Very large, macroscopic cyrstals of #[Cu(OH_2)_6]SO_4# can be grown from these solutions:

https://tse1.mm.bing.net/th?id=OIP.-ayXreQ2xvtq72IqKrD3TwEsD1&pid=15.1&P=0&w=204&h=168

And when glucose is dissolved in water, a colourless solution results. On the other hand, #"cuprous oxide"#, i.e. #Cu_2O#, is a brick-red powder, that is insoluble in water.

https://tse2.mm.bing.net/th?id=OIP.UwdDbLppcRpvtXXwPBxqWAD6D6&pid=15.1&P=0&w=300&h=300

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