This Blue Solution Turns Brown in Seconds! 😱

Added: 2026-05-16

[00:00:00]At the start, we have a bright blue solution of copper sulfate. This is our initial state. As time progresses, we begin to see copper depositing on the iron nail. You can observe small reddish-brown particles forming. The blue color of the copper sulfate solution starts to fade. This indicates that the copper ions are being consumed.

[00:00:14]The solution continues to change color, turning greener. This is because iron ions are now forming in the solution.

[00:00:19]Finally, at 60 seconds, the solution is a addition of ferrous sulfate. The iron nail is now covered in a thick layer of copper. At the molecular level, iron atoms from the nail displace copper ions from the solution. At the start, we have a bright blue solution of copper sulfate.