We’re being asked to identify the reducing agent in the given reaction:
2 Cr(OH)3 + 3 OCl– + 4 OH– → 2 CrO4–2 + 3 Cl– + 5 H2O
To do so, we need to identify the change in oxidation state for each element in the reaction.
Recall the mnemonic for redox reactions:
Loss Electrons → Oxidation → Reducing Agent
Gain Electrons → Reduction → Oxidizing Agent
This means the element that loses electrons/oxidized is the reducing agent.
We’re given the balanced redox reaction so we can ignore the coefficients, OH–, and H2O and only focus on Cr(OH)3, OCl–, CrO42–, and Cl–.
Frequently Asked Questions
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 Redox Reactions concept. If you need more Redox Reactions practice, you can also practice Redox Reactions practice problems.
What is the difficulty of this problem?
Our tutors rated the difficulty ofWhich substance is the reducing agent in this reaction?2 Cr(...as medium difficulty.
How long does this problem take to solve?
Our expert Chemistry tutor, Sabrina took 4 minutes and 3 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 Morgan's class at ASU.