Post by: monokekie on November 11, 2009, 12:47:10 pm
:) thanks for your help
Post by: Mao on November 11, 2009, 12:52:27 pm
Anode (negative) -
Cathode (positive) -
You can see here that sulfate ions migrate to both electrodes (no net migration), while H+ only migrate towards the positive electrode.
Post by: monokekie on November 11, 2009, 01:02:13 pm
mmm. so i think the answer is wrong..
Post by: Dark Horse on November 11, 2009, 01:13:01 pm
Post by: Jarzoon on November 11, 2009, 02:52:51 pm
xie xie la, this is a question from stav09 question 6 C, the answer says it is negatively charged sulfate.
mmm. so i think the answer is wrong..
Yeah it is wrong. Should be H+
Post by: Mao on November 11, 2009, 04:21:19 pm
Does the net migration occur because they are reactants at these electrodes, or is it to balance charge out like a salt bridge (anions to anode, cations to cathode?)
Because they are reactants, they are being consumed at one end.
Post by: silva on November 11, 2009, 04:25:19 pm
the H2SO4 isnt a salt bridge, so the whole anions to the anode, cations to the cathode doesnt apply, because it is the elecrolyte
the SO4 ion have a NET migration to the postive electrode...this still means they are found at anode and can participate in that reaction
Post by: monokekie on November 11, 2009, 05:33:57 pm
no the answer is correct i discussed this with my teahcer today, cathode has a positive charge hence the negativer sulfate ions migrate to it,
the H2SO4 isnt a salt bridge, so the whole anions to the anode, cations to the cathode doesnt apply, because it is the elecrolyte
the SO4 ion have a NET migration to the postive electrode...this still means they are found at anode and can participate in that reaction
um okay.. thanks! but i don't see why is H+ incorrect?