Manganese (II) chloride and sodium hydroxide

In summary, the conversation discusses a reaction of manganese (II) chloride with sodium hydroxide and the subsequent addition of hydrogen peroxide. It is questioned whether the hydroxide ions displace the chloride ions or take a hydrogen from the water in the complex, and it is confirmed that the hydrogen peroxide is oxidizing the manganese. The conversation also mentions finding the equation for this reaction and suggests researching the brown product formed. There is also a question about the role of chlorides as ligands in the complex.
  • #1
TheTourist
25
0
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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  • #2
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.
 
  • #3
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?
 
  • #4
Are you sure chlorides are ligands?
 
  • #5


Based on the information provided, it appears that the reaction between manganese (II) chloride and sodium hydroxide results in the formation of a complex compound. The hydroxide ions likely displace the chloride ions, forming a new complex compound with manganese (II) and hydroxide ions.

The addition of hydrogen peroxide likely causes oxidation of the manganese (II) ions to manganese (III) ions, resulting in a darkening of the solution. This can be written as the following equation:

MnCl2 + 2NaOH + H2O2 → Mn(OH)3 + 2NaCl + H2O

This reaction can be classified as a redox reaction, where the manganese is both oxidized and reduced. The hydrogen peroxide acts as an oxidizing agent, causing the oxidation of manganese (II) to manganese (III).

I would recommend further testing and analysis to confirm the exact reaction and products formed in this reaction. This could include conducting a series of tests, such as pH testing, to determine the exact composition of the complex compound formed. Additionally, further analysis could be done to confirm the oxidation state of the manganese in the final product.
 

1. What is the chemical formula for manganese (II) chloride and sodium hydroxide?

The chemical formula for manganese (II) chloride is MnCl2 and the chemical formula for sodium hydroxide is NaOH.

2. What happens when manganese (II) chloride and sodium hydroxide are mixed together?

When manganese (II) chloride and sodium hydroxide are mixed together, they undergo a double displacement reaction, forming manganese (II) hydroxide and sodium chloride. The balanced chemical equation for this reaction is MnCl2 + 2NaOH → Mn(OH)2 + 2NaCl.

3. Is manganese (II) chloride soluble in water?

Yes, manganese (II) chloride is soluble in water. It forms a clear, colorless solution in water.

4. How is manganese (II) chloride and sodium hydroxide used in industry?

Manganese (II) chloride and sodium hydroxide are used in various industrial processes, including the production of dry cell batteries, textile dyes, and ceramics. Manganese (II) chloride is also used as a catalyst in organic synthesis reactions.

5. Is manganese (II) chloride and sodium hydroxide toxic?

Both manganese (II) chloride and sodium hydroxide can be toxic if ingested in large quantities. It is important to handle these chemicals with proper safety precautions and to follow the recommended handling and disposal procedures.

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