Manganese (II) chloride and sodium hydroxide

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Discussion Overview

The discussion revolves around the reaction between manganese (II) chloride and sodium hydroxide, exploring the nature of the reaction, the role of hydroxide ions, and the subsequent addition of hydrogen peroxide. Participants are examining the chemical interactions and potential products formed during these reactions.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant questions whether hydroxide ions displace chloride ions or take a hydrogen from water in the manganese complex.
  • Another participant confirms that hydrogen peroxide is oxidizing the manganese but does not provide a detailed explanation.
  • A participant seeks clarification on the nature of the manganese complex and the specific interactions between hydroxide ions and chloride ions.
  • There is a challenge regarding whether chlorides can be considered ligands in this context.

Areas of Agreement / Disagreement

Participants express uncertainty regarding the specific interactions in the manganese complex and whether chlorides are ligands, indicating that multiple competing views remain without a consensus.

Contextual Notes

Participants have not resolved the assumptions about the nature of the manganese complex or the specific products formed during the reactions. The discussion lacks definitive conclusions on the chemical equations 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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