Aluminum and iron(III) reaction

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The discussion centers on the unexpected reaction between aluminum metal and iron(III) chloride solution, which produces hydrogen gas on the aluminum's surface. The reaction involves aluminum interacting with hydronium ions in the acidic solution created when iron(III) chloride is dissolved in water. This acidic environment can lead to the etching of aluminum, contrary to initial expectations that aluminum would simply oxidize while iron would reduce. The conversation highlights the need for further research on iron(III) chloride and its properties, particularly its use as an etchant in applications like homemade circuit boards. The challenge of balancing the chemical equation is noted, especially regarding the fate of oxygen from water during the reaction.
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I was not expecting there to be a reaction between aluminum metal and a solution of iron chloride. I thought the aluminum would be oxidized and the iron reduced. What is the reaction that is occurring that is creating hydrogen gas on the surface of the aluminum? I know it has to do with aluminum reacting with the hydronium ions in solution but I can't come up with a balanced equation because i don't know what happens to the oxygen from the water. Thanks.
 
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Perhaps you should do some research on iron (ferric) chloride.

http://en.wikipedia.org/wiki/Iron(III)_chloride

When it is dissolved in water, it makes an acidic solution. This solution is commonly used as a cheap etchant for making home-made circuit boards. If the solution is strong enough, it will etch metals like aluminum.
 

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