Electrolysis can be thought of as a redox reaction. Discuss the statement by explaining the changes that take place at the anode and cathode during electrolysis, using an example of a molten ionic compound (potassium chloride) .

Write half equations for the reactions occurring at each electrode.

Hints:

1. Identify metallic and non-metallic substances.
2. What are the charges of a metallic and non metallic ions.
3. Identify which electrode the ions go to.
4. Discuss whether electrons are lost or gained at this electrode.

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.