Answer to Question #199704 in General Chemistry for lea

Question

1. Why was the piece of steel wool stretched before being heated with the Bunsen burner?

3. Why was it necessary to dispose the contents of the A4 ( A4: potassium iodide solution lead(II) nitrate solution ) vial into a separate waste container?

Answer 1

To remove rust,

Steel wool, on the other hand, is made of lots of thin strands, and so a lot myore iron atoms are in contact with the oxygen in the air. ... The product of the burn is bits of rust, or iron oxide, just as the product of burning wood is black ash (or carbon).