Manganese (II) chloride and sodium hydroxide

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The reaction between manganese (II) chloride and sodium hydroxide involves hydroxide ions interacting with the manganese complex, potentially displacing chloride ions or altering water molecules. The addition of hydrogen peroxide results in a vigorous reaction that darkens the solution, indicating that the peroxide is oxidizing the manganese. The discussion emphasizes the need to identify the brown product formed to write the correct chemical equation for the reaction. Clarification is sought on whether chloride ions act as ligands in this complex. Understanding these interactions is crucial for accurately representing the chemical processes involved.
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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