Chemistry Oxidation Reduction question!!?

Question

Galvanizing, a process used to prevent corrosion, involves coating iron metal with a thin layer of zinc metal

1) Iron nails can be galvanized using an electrolytic process. The nails to be galvanized would be attached to the

A- anode
B- electrode at which anions react
C- electrode at which oxidation occurs
D- electrode at which reduction occurs

2) A galvanized nail was placed in copper(ll) sulphate solution. After a day, the blue color of the solution disappeared and copper metal was produced. The procedure was repeated with objects made of other metals. Similar results would not be predicted for

A-an uncoated iron nail
B-a chromium plated spoon
C-a nickel plated coin
D-a gold plated bracelet

Im not sure the answers for these 2 questions..

Answer 1

1) D- electrode at which reduction occurs
Reason: The nails to be galvanized would have metal deposited on surface of the nails, thus metal reduction must take place. Also, in electrochemistry, the anode is where oxidation occurs.

2) D-a gold plated bracelet.
Reason: Fe, Zn, ni, Cr, ... all these metal have more negative reduction potential thn Cu, except Au. Thus when any of these metals is in contact with Cu(2+) solution, it would have potential to disolve at the expense of copper deposition, except Au. You may check the table of standard reduction potentials to confirm.

Answer 2

A. this is a combustion reaction. Methane isn't ionic so Carbon do not have a unfavorable cost. even if, as with each combustion reactions, it truly is a redox (oxidation-relief) reaction contained in the experience of oxygen earnings(oxidation) and hydrogen loss(relief). B. this is a acid-base (neutralization) reaction. it truly is a double displacement the position water is formed. C. this is a double displacement. The anions and cations of two diverse molecules swap places, forming 2 completely diverse compounds. D. it is likewise a double displacement. Zn is oxidized from 2+ to six+ yet no longer something is decreased concurrently so it is basically an oxidation. *** bear in concepts that a redox reaction is assessed by:- a million. The move of oxygen [earnings of oxygen=oxidation; lack of oxygen=relief] 2. The move of hydrogen [earnings of hydrogen=relief; lack of hydrogen=oxidation] 3. The move of electrons [earnings of electrons=relief; lack of electrons=oxidation]