Problem: Which of the following reagents would oxidize Zn to Zn2+, but not Fe to Fe3+a) Ca2+b) Br2c) Cod) Cae) Br-f) Co2+

The ease to remove an electron from an element is also related to cell potential.

• Smaller (↓) E° → oxidation → weaker oxidizing agent
• Larger (↑) E° → reduction → stronger oxidizing agent

Given:

Zn²⁺ + 2 e^‒ ⇌ Zn E° = ‒0.7618 V

Fe³⁺ + 3 e^‒ ⇌ Fe E° = ‒0.037 V

Ca²⁺ + 2 e^‒ ⇌ Ca E° = ‒2.868 V

• lower E° than Zn²⁺/Zn and Fe³⁺/Fe

• Ca²⁺ → will not oxidize both Zn and Fe

95% (194 ratings)

Which of the following reagents would oxidize Zn to Zn²⁺, but not Fe to Fe³⁺

a) Ca²⁺

b) Br₂

c) Co

d) Ca

e) Br^-

f) Co²⁺

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 Reaction concept. You can view video lessons to learn Redox Reaction. Or if you need more Redox Reaction practice, you can also practice Redox Reaction practice problems.

What professor is this problem relevant for?

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