What change will occur to the equilibrium mixture
\( 2CrO^{2-}_4(aq) + 2H^+(aq) ⇔ Cr_2O^{2-}_7(aq) + H_2O(l) \) when excess sodium hydrogen solution is added?
A.
A yellow precipitate of Cr(OH)3 is formed
B.
An orange precipitate of Cr(OH)3 is formed
C.
The colour changes from orange to yellow
D.
The colour changes from yellow to orange
E.
There is no visible reaction.
Correct Answer: Option C
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