IB Chemistry Common Multiple Choice Questions

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Analyzing 7 common multiple-choice questions often seen on the IB  chemistry  HL exam paper 1. The topics are oxidation  and  reduction, forming a buffer solution from different concentrations of weak/strong acids/bases, enantiomers, electron configuration exceptions  and  of ions, identifying sigma  and  pi bonds in organic molecules, acid/base concentration vs. pH  and  spontaneity of redox reactions/electrochemistry/activity series.
For  more  IB Chemistry resources, go here https://sites.google.com/site/thechemistrytranslator/ chemistry —milam-plymouth/ib-chem-milam-hl

Comments

chocolatedev says:

super helpful video!

Victoria Dontsova says:

I have a chemistry exam today, and your video adressed the things that I was the most uncertain about. Thank you!

Sarah Ghalmi says:

Is IB the same thing as AP Chem

Oliver Skoglund says:

How does one go about to calculate the E(cell) efficiently? I am a bit split on how to do it correctly. According to my book, one should use the equation E(cell)=(Electrode were reduction occurs) – (Electrode were oxidation occurs.) If we take the first example in #7 this would give E(cell)= (-.76)-(-.8)=0.04. This is obviously not correct. Am I doing it wrong? Should one simply plug in the value as given for the equation? e.g E(cell)=(-.76)-(.8)=-1.56. Then it is correct but then we do not change the sign for the reaction to have the potential of the oxidation. My teacher said "Take the highest value and subtract the lowest", then we would get: (0.8)-(-0.76)=1.56, which is even more wrong! Any ideal solution?

donthaveone donthaveone says:

(-_+)
Sir eye need an extension on my paper!

Mira says:

Thank you sir, this was very helpful

Jens Kühnel says:

Really helpful! Although I thought only Cr and Cl were exceptions in electron configuration like question #4?

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