ATAR Notes: Forum
VCE Stuff => VCE Science => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Chemistry => Topic started by: onlyfknhuman on November 12, 2008, 08:40:08 pm
-
question 6 short answer,
it asks the direction of the electron. which is from anode to cathode, hence zinc to copper it says.
then it askes u to write the equations of teh anode and cathode
the anode was zn -> zn2+ +2e-
and the cathode was 2H++2E- -> H2
the question states, that it produces hydrogen at the cathode.
But why does the answwer to the previous question say that its going from zinc to copper.
-_-'so shuldnt the cathode be a copper half equation
-
Copper can still act as a cathode but just not react.. it is just a conductive metal used as an electrode as the surface for the reduction of hydrogen ions
-
Zn is a stronger reductant than Cu and so will be preferentially oxidised.
-
oh fuck is copper an inert electrode... totally blanked out on that
-
no, copper is not inert
but Zn is a stronger reductant, and H+ is the strongest oxidant, hence copper in this case doesn't react.