# Problem: In the following redox reaction, dichromate ion, Cr 2O7 2- , oxidizes Fe2+ to yield the following products. Cr2O7 2- (aq) + 6 Fe 2+ (aq) + 14 H + (aq) → 2 Cr 3+ (aq) + 6 Fe 3+ (aq) + 7 H 2O (l) If it takes 35.0 mL of 0.250 M FeCl 2 to titrate 100 mL of a solution containing Cr 2O7 2- , what is the molar concentration of Cr2O7 2- ?  a. 0.015 M b. 0.053 M c. 0.027 M d. 0.045 M

🤓 Based on our data, we think this question is relevant for Professor Pepple's class at KSU.

###### Problem Details

In the following redox reaction, dichromate ion, Cr 2O7 2- , oxidizes Fe2+ to yield the following products.

Cr2O7 2- (aq) + 6 Fe 2+ (aq) + 14 H + (aq) → 2 Cr 3+ (aq) + 6 Fe 3+ (aq) + 7 H 2O (l)

If it takes 35.0 mL of 0.250 M FeCl 2 to titrate 100 mL of a solution containing Cr 2O7 2- , what is the molar concentration of Cr2O7 2-

a. 0.015 M

b. 0.053 M

c. 0.027 M

d. 0.045 M

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Solution Stoichiometry concept. You can view video lessons to learn Solution Stoichiometry. Or if you need more Solution Stoichiometry practice, you can also practice Solution Stoichiometry practice problems.

What is the difficulty of this problem?

Our tutors rated the difficulty ofIn the following redox reaction, dichromate ion, Cr 2O7 2- ,...as medium difficulty.

How long does this problem take to solve?

Our expert Chemistry tutor, Jules took 3 minutes and 37 seconds to solve this problem. You can follow their steps in the video explanation above.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Pepple's class at KSU.