in this experiment we are going to use a
electricity to separate copper and chloride ions okay it's an electrolysis experiment
so we're separating using electricity this is the power supply that we're going to use
i've got it set at 12 volts and we're going to use the dc power supply direct current so that one
electrode is continually positive one electrode is continually negative and that allows us to to
separate the two ions okay so i'm going to put one wire into the red socket of the dc supply another
wire into the black socket of the dc supply and i have got my electrode holder which is
going to sit on top of the beaker here and i've got my carbon electrodes here that i'm going
to just hold in place with the crocodile clips and then i can attach the wires to the crocodile
clips okay so the black wire is attached to the negative terminal of the power supply and the red
wire is attached to the positive terminal of the power supply so this is my positive electrode
and this is my negative electrode i can then add my copper chloride solution to the beaker
you can see copper chloride solution is a blue colored solution because of the blue
colored copper ions that are in there okay so we've got the power supply set to 12
volts and they're going to turn on the power supply and we're looking to observe
any changes that happen at each electrode so you can see straight away here at the
positive electrode we have a gas formed you can see the bubbles of gas forming there at the
positive electrode and at the negative electrode you can see that a solid is starting to
form on that electrode there on the negative electrode okay so we can confirm that
it's chlorine gas being produced at the positive electrode using some moist blue
litmus paper chlorine gas will bleach moist blue litmus paper so if i hold that
just above the electrode you can see already that that blue moist litmus paper has bleached
confirming that his chlorine gas has formed and you can also just by gently wafting
you'll get the characteristic chlorine smell as well so at the negative electrode we
have got this solid formed and the solid formed is copper the copper ions from solution the
positive copper ions have been attracted to the negative electrode will have gained electrons
to form copper atoms so copper has been formed