Question 6 In punification of copper, Impure copper is electrolyzed to form pure copper Below is a cell diagram
showing the clectrolysis of impure copper.
a) Write the half reaction equation at the; (2 marks)
Impur
i) cathode:
il) anode:
b) Write the overall balanced equation (2 marks)​

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The nuclear potential that binds protons and neutrons in the nucleus of an atom is often approximated by a square well. imagine a proton conned in an innite square well of length 105 nm, a typical nuclear diameter. calculate the wavelength and energy associated with the photon that is emitted when the proton undergoes a transition from the rst excited state (n 2) to the ground state (n 1). in what region of the electromagnetic spectrum does this wavelength belong?

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