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Chemistry
Chemistry
Problem
When a solution of
Na
2
Cr
2
O
7
\text{Na}_2\text{Cr}_2\text{O}_7
Na
2
Cr
2
O
7
is treated with amyl alcohol and acidified
H
2
O
2
\text{H}_2\text{O}_2
H
2
O
2
, the layer of amyl alcohol turns blue. What is the blue colouration? a.
Cr
2
+
\text{Cr}^{2+}
Cr
2
+
b.
CrO
5
\text{CrO}_5
CrO
5
c.
CrO
4
\text{CrO}_4
CrO
4
d.
Cr
2
+
+
CrO
5
\text{Cr}^{2+} + \text{CrO}_5
Cr
2
+
+
CrO
5
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