Preparing AlCl3 (Hexahydrate) 100ml

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Discussion Overview

The discussion centers around the preparation of a 15% Aluminum chloride (hexahydrate) solution from anhydrous Aluminum chloride powder. Participants explore methods for achieving this in small quantities, specifically 100ml, while addressing safety concerns and the chemical process involved.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Experimental/applied

Main Points Raised

  • One participant inquires about the feasibility of preparing a 15% solution of Aluminum chloride (hexahydrate) from anhydrous Aluminum chloride powder.
  • Another participant suggests adding water to the anhydrous Aluminum chloride, noting that the reaction can be quite exothermic and recommending careful addition of water.
  • Some participants propose leaving the Aluminum chloride out in humid air to allow it to absorb moisture before mixing with water, suggesting this method is less hazardous.
  • A participant mentions that adding water will yield Aluminum chloride (hexahydrate) in crystalline form and seeks clarification on how to achieve a 15% solution.
  • One response specifies that to create a 15% mass solution, one should mix 15g of Aluminum chloride hexahydrate with 85g of water, but notes that the final volume may not be exactly 100ml.
  • Another participant suggests using dilute hydrochloric acid instead of water to prepare Aluminum chloride hexahydrate from anhydrous Aluminum chloride.

Areas of Agreement / Disagreement

Participants express differing opinions on the best method to prepare the solution, with some advocating for water and others suggesting dilute hydrochloric acid. There is no consensus on the optimal approach or the exact final volume of the solution.

Contextual Notes

Participants mention safety concerns regarding the exothermic reaction when adding water to anhydrous Aluminum chloride and the potential for explosive reactions. The discussion includes various methods and assumptions about the preparation process, but lacks definitive conclusions.

guyat35
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Is it possible to prepare Aluminum chloride (hexahydrate) solution(15%) from Aluminum chloride powder (ANHYDROUS)? I need it only in small quentities ie. 100ml.
Please help.
 
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Just add water, stirr, a bit of heat would help but not too much.

Seriously water plus AlCl3 is a very powerful almost explosive reaction, lots of heat comes out of it. So you will have to add the water carefully. A simple method is take your AlCl3 and leave it out in the open for a few days, it will absorb ambient humidity and then adding more water will be by far less explosive. Or add water with a steam bath. Easy to build, take a pot with a lid add hot water in it, and place your AlCl3 in a cup so that it does not get wet or floats, close the lid and wait for a bit.
 
Last edited:


... or just leave it out in the moist air. Takes longer. Not as exciting.
 


Lok said:
Just add water, stirr, a bit of heat would help but not too much.

Seriously water plus AlCl3 is a very powerful almost explosive reaction, lots of heat comes out of it. So you will have to add the water carefully. A simple method is take your AlCl3 and leave it out in the open for a few days, it will absorb ambient humidity and then adding more water will be by far less explosive. Or add water with a steam bath. Easy to build, take a pot with a lid add hot water in it, and place your AlCl3 in a cup so that it does not get wet or floats, close the lid and wait for a bit.

Thanks for the help. I think adding water to AlCl3 will give me Aluminum chloride (hexahydrate) in white crystal form. But how can make a 15% solution of Aluminum chloride (hexahydrate)? Adding Alcohol? Is it the right way? please help
 


Alcohol is for later... evenings in pubs.

All you need to do is (assuming that the 15% is in mass percentage) add 15g of AlCl3hexa to 85g of water. The result will be 15%, but I cannot guarantee that you will end up with 100ml, rather close to that anyway.

If the solution should be in alcohol, there should be some mention of that in the formula. The same goes with the percentage for alcohol 85 g, and still no telling how close the volume will be.
 


guyat35 said:
Is it possible to prepare Aluminum chloride (hexahydrate) solution(15%) from Aluminum chloride powder (ANHYDROUS)? I need it only in small quentities ie. 100ml.
Please help.
To get AlCl3*6H2O from AlCl3 it's better if you use dilute HCl, instead of water.
 

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