Learning to control the movement of ions
Which team of ions will be faster – blue or yellow?
Attention! All experiments are performed by professionals. Do not attempt.
An electrode with a positive charge is called an anode because it attracts particles with a negative charge (anions). An electrode with a negative charge is called a cathode as it attracts particles with a positive charge (cations). Therefore, the green strip of the starting material is divided in two – a blue segment consisting of copper cations and a yellow segment consisting of chromate anions. When we change the polarity of the electrodes, we simultaneously switch their charges – and the stripes begin to move in opposite directions. This is how ionic races go!
Cool and safe experiments await you in the MEL Chemistry subscription!