Okay, so for our test tomorrow

I want to be sure.

Only chapter 1 & 2 will be tested right?

Chapter 3 is NOT on the test?

Yes its chapter 1 (only thermodynamics) and chapter 2 (everything!)

good luck Jon!

It seems as if Dr. Yang has confused everyone nicely

Originally Posted by muons

It seems as if Dr. Yang has confused everyone nicely

He's definitely pro at that. Ahh, it's going to be a LONG night :/

Thanks for the replies. Quick question:

The pH of a 100 mL solution containing 1 mL of 10 mM SHS, 1 mL of 10 mM MOPS and 20 mL of 500mM HCL is (MOPS:pK=7.2; SHS:pK=5.5)...


where do I even begin?

Originally Posted by JonSnow

Thanks for the replies. Quick question:

The pH of a 100 mL solution containing 1 mL of 10 mM SHS, 1 mL of 10 mM MOPS and 20 mL of 500mM HCL is (MOPS:pK=7.2; SHS:pK=5.5)...


where do I even begin?

i think for this question the TA said to only take into account the HCL since shs and mops were relatively small

Good luck on your test people.

how'd you guys do?

Went OK for me - anyone know if the answers will be up?

lol @ J and KJ trickery... having to watch for conversions.

Originally Posted by JonSnow

Thanks for the replies. Quick question:

The pH of a 100 mL solution containing 1 mL of 10 mM SHS, 1 mL of 10 mM MOPS and 20 mL of 500mM HCL is (MOPS:pK=7.2; SHS:pK=5.5)...


where do I even begin?

Just pay attention to what you have and how much of it relative to the others. HCl dominates (20x the volume as the others, 500x the concentration. Also, HCl is a strong acid, while the other two will barely produce any H+ at all). pH is easy with just HCl.

I actually did it will all three to make sure (in practice, not on the test lol), and they only add like a 0.001 difference (Or something like that, I forget).

Augh water-ice question. Otherwise alright.

Also the question that mentioned C-H's can form hydrogen bonds. I swear I don't remember that from the textbook.

I ended up having to eliminate on those...lol

Originally Posted by arathbon

Augh water-ice question. Otherwise alright.

Originally Posted by arathbon

Also the question that mentioned C-H's can form hydrogen bonds. I swear I don't remember that from the textbook.

these .

Originally Posted by giftedchick

these .

I looked it up online. Apparently it's true they can.