During a recent lab on electrochemistry, students were required to stir a strong acid solution until it tumed into slimell Not able to find the appropriate stirrers, the students decided to improvise: Ernest used an iron spatula, Fritz used a piece of copper wire and Niels used a silver spoon. After the lab, they compared their findings and were puzzled by the results: One of the groups obtained a completely different reaction, which they were unable to explain. Who did not get the correct results in the lab?