Dekoyl's Questions

[Mao]

Addition of Ag+ does not affect FeSCN2+. The addition of Ag+ removes a reactant, SCN-. By LCP, the system will try to replace the SCN- by a net backward reaction, which increases [Fe3+].

[dekoyl]

From a NEAP exam, they have an electrolytic cell: with electrodes A(-ve) and B (+ve) and an aqueous electrolyte. After current has been passing through the cell for some time, a "reddish brown liquid" was deposited on electrode A (-ve).

What is this brown liquid, and, what is the possible electrolyte for this cell?

[/0]

Wow, that is a bad question, trust it to come from a trial exam company ahaha

I think you need to "know" that is kinda brownish (from having done enough trial exams -.-)

The equations are

(positive anode)

(negative cathode)

A possible electrolyte is anything that goes with and is soluble... I'm taking a stab here but possibly?

I will RAGE if anything like this appears on the actual exam

[dekoyl]

Yeah you're right. The electrolyte they were after was but anyway, you're awesome.

[chem-nerd]

I think you need to "know" that is kinda brownish (from having done enough trial exams -.-)

or from your Unit 3 organic pathways knowledge of the Br₂ test for unsaturation

[dekoyl]

Take
For a graph of "milimol"(y-axis) vs "unit of charge"(x-axis), is it for every millimol there is 2 units of charge? So, the first coordinate point would be (2,1) on the graph?
NEAP says that it is 1:1 (so first point is (1,1)) and that for , it is 1 unit of charge to 2 millimoles (so first point is (1,2)).