A company is claiming to have built a battery that can generate power from pure water. Something seems fishy, so it is up to you to figure out their tricks.
![A battery coloured with the texture of water. Image by David Armstrong.](/pbl/sites/files/pbl/styles/full_width_m/public/shared/Wonder_water.png.webp?itok=5eEy1d4c)
Problem written by: Eddie On
Curriculum items covered: Oxidation and reduction, electrochemical cells, reduction potentials.