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Ethanol (C2H5OH) is oxidized to acetaldehyde (CH3CHO) by dichromate ions in acidic solution accordinKinetics Chemistry Question

Question

Ethanol (C2H5OH) is oxidized to acetaldehyde (CH3CHO) by dichromate ions in acidic solution according to the following equation:
3 C2H5OH(aq) + Cr2O7 2-(aq) + 8 H+(aq) ® 3 CH3CHO(aq) + 2 Cr3+(aq) + 7 H2O(l)
If the concentration of Cr3+(aq) is increasing at a rate of 0.18 M s-1, at what rate is the concentration of CH3CHO(aq) changing?

A.

Increasing at 0.12 M s-1

B.

Increasing at 0.27 M s-1

✓ Correct
C.

Decreasing at 0.12 M s-1

D.

Decreasing at 0.27 M s-1

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