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Problem: Identify the atoms that are oxidized and reduced, the change in oxidation state for each, and the oxidizing and reducing agents in each of the following equations:(a) Mg(s) + NiCl2(aq) ⟶ MgCl2(aq) + Ni(s)

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FREE Expert Solution

To determine which element is reduced or oxidized, we must identify the changes in their oxidation states. Compare the oxidation number of the element on the reactant side and on the product side.

Remember the mnemonics:

Loss                Gain

Electrons         Electrons

Oxidation         Reduction


Reaction:

Mg(s) + NiCl2(aq) ⟶ MgCl2(aq) + Ni(s)

Recall the rules for the oxidation states of some elements



Reactants:

 Mg(s) → Standard state → O.S = 0 

• NiCl2(aq) → 

Cl → Group 7A →  O.S = -1

▪ overall oxidation state of NiCl2= 0 (neutral compound)

   oxidation state of Ni + 2 oxidation state of Cl = 0

   Ni + 2(-1) = 0

   Ni  -2  = 0

 Ni  → O.S = +2


Products:

MgCl2(aq)

  •  Cl → Group 7A →  O.S = -1
  • overall oxidation state of MgCl2= 0 (neutral compound)   
  • oxidation state of Mg + 2 oxidation state of Cl = 0
       Mg + 2(-1) = 0
       Mg  -2  = 0
     Mg  → O.S = +2

 Ni(s) → Standard state → O.S = 0 


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Problem Details

Identify the atoms that are oxidized and reduced, the change in oxidation state for each, and the oxidizing and reducing agents in each of the following equations:

(a) Mg(s) + NiCl2(aq) ⟶ MgCl2(aq) + Ni(s)

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 professor is this problem relevant for?

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

What textbook is this problem found in?

Our data indicates that this problem or a close variation was asked in Chemistry - OpenStax 2015th Edition. You can also practice Chemistry - OpenStax 2015th Edition practice problems.