If the reduction half-reaction Cd(2+)(aq) + e- ? Cd(s) has to be multiplied by 2 to balance the electrons before you add it to an oxidation half reaction, what is the electrical potential of this reduction half reaction?

I got an answer of -0.40 V. Am i correct?

What is the value of DGo in kJ at 25 oC for the reaction between the pair:

Cu(s) and Cr3 (aq) to give Cr(s) and Cu2 (aq)

Use the reduction potentials for Cr3 (aq) is -0.74 V and for Cu2 (aq) is 0.34 V.

I know that Cu is being reduced since its reduction potential is higher but then that makes Cr 0.74 for the oxidation potential. So E is positive and doesn’t that make G negative since G = -nFE?

I keep getting -6E2. How would it be positive?

When you’re working out what will be oxidised and reduced in a redox reaction for electrochemistry – why is it that the substance higher up on the standard reduction potentials list will always be the substance that is oxidised. I would’ve thought that..cause it was a more active metal (like Lithium) it would have been more easily reduced…not oxidised.

Help please!
but doesn’t lithium have a charge of 1+, meaning that one electron would bring it into its lowest energy state…isn’t this what it wants? Why would it get rid of an electron (i.e easily oxidise) if it can reduce to form a lithium atom.

A. potential difference
B. oxidation potential
C. reduction potential
D. electrolysis

Please Help!

A metal corrodes faster when it is in contact with another metal which ***.

ahas a lower reduction potential
bhas a lower oxidation potential
chas a higher reduction potential
dhas a higher position on the electrochemical series

I think it’s a)?

ORP stands for oxidation reduction potential. This is a number measurable by an ORP meter in the unit of mv (milli-volt), either a positive or negative number. We all know that anti-oxidants are good for the body, and essentially water with negative ORP are anti-oxidizing by nature. Negative ORP water that is ingested will be absorbed in the human body and act as natural anti-oxidants and hunt down free-radicals that tend to cause harm to the body. Knowing this, the more negative the ORP of the water, the better it is for you in most cases.

Most of the time, when the PH is higher (more alkaline), the more negative the ORP will be. You can say that the pH and ORP are inversely proportional. Usually water of 9.5 pH would possibly have an ORP of around -200 to -300 mV or so. Of course this number can vary and all depends on how the alkaline water is made.

Most tap water and regular bottled water has a low to medium positive ORP number in the 100 to 300 range (positive). Soft drinks typically have a very high positive ORP number, sometimes in the range of 500 to 600! And we all know how bad soft drinks are to the body, namely because they are highly acidic. And now we know that it’s bad also because it has a terribly high positive ORP number. Drinking soft drinks is like encouraging the free radicals in the body to flourish and attack our healthy cells. Who wants that? No wonder kids that drink soda/soft drinks all day long are so messed up health-wise.

Alkaline water,  either naturally occuring or made by either electrolysis, will usually have a high pH and the decently negative ORP. This is good for the body! Many studies have shown health benefits from alkaline, negative ORP water. Afterall, you are drinking anti-oxidizing fluids when you drink this kind of water.

Are you drinking alkaline water with negative ORP daily? You should.