Test Yourself A level Chemistry - Electrode Potentials 1

[@em8136]

Godsend

[@thevinecompany7733]

Hi sir could you do a quick explanation on the effect of increasing conc on the cell potential as I didn't quite get q1 a ii

[@ryder883]

At 7:12 will I get the marks if I balanced the equations because each half cell has a different number of electrons? I wrote down: 2Mn^2+, 8H2O, 10Fe^3+ and 5Br2 Basically I imaged that all three half cells were redoxing together so I had to make sure the electrons matched from the data in the question. And for the last question would hydrogen being more volatile/explosive because it’s a gas compared to Methanol being a liquid be a valid answer? Thanks

[@TheRealDanielTV]

Hi my favourite geordie teacher. Thanks for the video, I have a question regarding 3:56 . Could you tell me the specific rule please as to whats making the reaction go in that direction, in terms of le chateliers. Thanks again, Daniel

[@TheRealDanielTV]

Hi does anyone know?

[@MaChemGuy]

If you increase the concentration of any reactant, an equilibrium will shift in the forwards direction to minimise the change. Because of this, the standard electrode potential increases

[@atiarimi7322]

Really well explained sir, thank you !

[@MaChemGuy]

Most welcome!

[@gegegege2458]

why are you using a silver electrode for the silver solution but a platinum electrode for the iron solution

[@MaChemGuy]

The two oxidation states for the iron are the two ions in the solution

[@angelahalton8827]

Hi there, for question 1a i, I was just wondering if the iron half cell should be drawn on the left because it has a more negative (less positive) electrode potential compared to the silver half cell?

[@MaChemGuy]

OCR does not insist on this so I don’t bother

[@angelahalton8827]

@@MaChemGuy ah ok thank you!

[@MaChemGuy]

@@angelahalton8827 You are right btw :)

[@simdicool5438]

very useful thank you!

[@ZuzannaPodgorska]

Why does the voltage become more positive when the Ag+ concentration is increased?

[@MaChemGuy]

Equilibrium shifts to the right