sushant269

they wont be that gay on the FRQ. they ll give u the equation jeez. If they dont, they ll have a picture. Then there wont be a problem at all.

chaz90

I don't think they can give us the problem w/out the eqn. If they do, look at electronegativity in regards to the periodic table.

tpaschoal

even if they dont give you the eq you have the potential chart so you can just look up the values there and decide which one will form a metal and which will form an ion

awf7285

I have an old AP problem with a pic of an electrochemical cell with Cr and Cu, no indicated directionality, and no eqn. That's why I asked.

PrescitedEntity

They provide the chart of reduction potentials. That's where you look if there's no equation, or if they ask you to write the equations.

awf7285

Thanks. You all are compositely so helpful! Another question. Could someone clarify the diff btwn Eo and E? as in the two e's in the equation E= Eo -RT/nF ln Q? (thanks.)

tpaschoal

Eo is the standard and the E is when you change the Q.

PrescitedEntity

Nernst equation, right?

E is the actual reduction potential. It's like deviation from ideal.

Eo is the standard (ideal) potential.

awf7285

Thanks again, yall.