Potassium dichromate, K, Cr,0,(aq) reacts with sulfuric acid, H,SO, (aq) to produce chromic acid (H.Cro, (aq) ) according to the following reaction. 24,0*(aq) + Cr20,? (aq) 2 H,Cro, (aq) + H2001) The chromic acid H,Cro, (aq) is made by adding 1.00 mL of 0.0196 M potassium dichromate, K, Cr,0, (aq) , to 10.0 mL of 3.9 M sulfuric acid, H,SO, (aq) Calculate the concentration of the chromic acid after this reaction has gone to completion Then 20.0 PL of CH,CH, OH (density 0.789 g/mL) is added to 2.00 mL of the solution containing H.Cro, (aq) Hint: 1.0ML = 0.001 m. The ethanol will be oxidized by the chromic acid according to the following reaction: 6H 0 (aq) + 3 CH,CH, OH(aq) + 2 H, Cro (aq) – 3 CH CHO (aq) + 2 Cr** (aq) + 14 H,000 1) Calculate the initial concentration of CH, CH,OH after it was added to the 2.0 mL of H.Cro_(aq) but before the reaction occurs. 2) Calculate the concentration of CH,CH,OH after the reaction with H,Cro, (aq) goes to completion What is the percent change in concentration of CH CH,OH? Hint: Use the concentration of the chromic acid you calculated after the first reaction has gone to completion to calculate the concentration of CH,CH,OH after the second reaction has gone to completion 3+ Select one:
A. The percent change in the concentration of ethanol is less than 1%
B. The percent change in the concentration of ethanol is between 1 and 2%
C. The percent change in the concentration of ethanol is between 3 and 4%
D. The percent change in the concentration of ethanol is between 5 and 6%
E. The percent change in the concentration of ethanol is between 6 and 7%