Aluminum naturally forms an oxide layer on its surface when exposed ... Chemically, this is the sodium salt of sulphuric acid, and you can dispose of it safely after neutralizing it with baking ...

The salt formed depends on the acid used. In this example we' re preparing copper sulfate crystals from copper oxide using dilute sulfuric acid. You'll need to wear goggles to protect your eyes.

They report that “anodic porous alumina (APA) surfaces prepared using electrochemistry in concentrated sulfuric acid have ... pillars of alumina (aluminum oxide).” These “needle-like pillars ...

This outlines one way to carry out the practical using copper(II) oxide powder and dilute sulfuric acid. Eye protection must be worn. 1. Add some dilute sulfuric acid to a small beaker.

They found that anodic porous alumina (APA) surfaces prepared using electrochemistry in concentrated sulfuric acid had unprecedented ... of alumina (aluminum oxide). These needle-like pillars ...