Manganese (II) chloride and sodium hydroxide

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SUMMARY

The reaction between manganese (II) chloride and sodium hydroxide involves hydroxide ions interacting with the manganese complex, specifically [Mn(H2O)4Cl2]. Hydroxide ions can displace chloride ions or replace a hydrogen in the water molecules of the complex. The addition of hydrogen peroxide subsequently oxidizes the manganese, resulting in a dark brown product. The balanced chemical equation for this reaction can be derived by identifying the brown manganese product formed during the reaction.

PREREQUISITES
  • Understanding of coordination complexes, specifically [Mn(H2O)4Cl2]
  • Knowledge of oxidation-reduction reactions and the role of hydrogen peroxide
  • Familiarity with chemical reaction equations and balancing them
  • Basic concepts of ligand displacement reactions
NEXT STEPS
  • Research the properties and reactions of manganese complexes
  • Learn about the oxidation states of manganese and the effects of hydrogen peroxide
  • Study ligand substitution reactions in coordination chemistry
  • Explore methods for balancing complex chemical equations
USEFUL FOR

Chemistry students, researchers in inorganic chemistry, and anyone interested in the reactions of transition metal complexes.

TheTourist
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I reacted a solution of manganese (II) chloride with sodium hydroxide, however I am unsure of the reaction.
Do the hydroxide ions displace the chloride ions or take a hydrogen from the water in the complex? Also after that reaction i added a few drops of hyrdogen peroxide, which caused a vigorous reaction and the colour to darken to a dark brown. Is the hydrogen peroxide oxidising the manganese? How do I write this as an equation?
Thanks
 
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TheTourist said:
Do the hydroxide ions displace the chloride ions or take a hydrogen from the water in the complex?

Please elaborate what you mean, while first idea is clear, the second one is not.

Is the hydrogen peroxide oxidising the manganese?

Yes.

How do I write this as an equation?

First step will be to find out what is the brown product. Googling for "brown manganese" should give you some ideas.
 
Borek said:
Please elaborate what you mean, while first idea is clear, the second one is not.

The manganese is in a complex [Mn(H2O)4Cl2]
Do the -OH ions react with the chloride ions in the complex or displace with a hydrogen in the water molecules in the complex to form a new water molecule and leave a -OH ligand in the complex?
 
Are you sure chlorides are ligands?
 

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