Chemistry Forum

I have a piece of equipment that has the following liquid chemicals CH₃COOH + HF + HNO₃ they were leaking onto a pump with an aluminum body. the end result is a white crystalline substance that is bonded to the cabinet. the cabinet is constructed from PFA. this stuff is bonded so well that I have to use a chisel to remove it. can anyone tell me what this stuff is?

Very strong chemical mixture. It will be an mixture of aluminiumoxide and -flouride.

What is the equation and type of this chemical reaction?

Oxidation of Aluminium, will create Aluminium oxide by nitric acid and Aluminium flouride by hydrogen flouride, Aluminium acetate is minor from acetic acid.

Is the balanced chemical equation for the above chemical reaction correct?

3 HF + 2 HNO₃ + 3 CH₃COOH + 6Al → 2 Al₂O₃ + AlF₃ + AlC₆H₉O₆ + 4 H₂ + N₂

NO. Dont use the solver without knowledge what is going on.

The main reaction is the redox reaction Al and HNO₃

HNO₃ + 3 H+ + 3e- => NO + 2 H₂O Reduction

2 Al + 3 H₂O => Al₂O₃ + 6 H+ + 6 e- Oxidation

2 Al + 2 HNO₃ => Al₂O₃ + 2 NO + H₂O summery

The oxid is able to react with HF or CH₃COOH.

Thanks for your correct answer.