stix2400

huh? what was sucrose an answer to? I don't remember it being correct for any of them.

feynman81591

sucrose is the one that does not create the odor. there was a question about what DOESNT create an odor when mixed in solution.

feynman81591

and yeah, NaCl added to a saturated solution will do absolutely nothing because it will be left in standing as precipitate. will neither affect density or concentration.

stix2400

oh right haha. I'm getting backwards, thinking that it asked which one did have an odor.

bonduck

to double check: there was one question asking what DOESN'T have an odor, and but there wasn't a question asking what DOES, right?

Are you sure the KI one is using a "sieve?" I put the water one, because logically, KI is the only one that would dissolve in water, whereas Fe and sand would not, thus extracting the KI

feynman81591

i am trying to think of all the number answers on the test

anybody recall 2 L times 740/760 times 273/300? (original volume times pressure1/p2 times temp2/temp1)

feynman81591

@ bonduck nahh water would not be the best method. crap could stay in water. you need a sieve to filter. a sieve is a type of net. i didnt know that either but i was looking for filtrating device of somekind and that is the only that could have been one.
also, no there was no question on what actually gives off an odor.
i spent so much time memorizing colors and all to no avail.

what do you guys the roundabout curve will be on this exam?

bonduck

I think that's what I got -- its hard to recall exactly what fractions I got for that question

Other stuff:
I also got five T/T/CE's

stix2400

yep to 740/760 time 273/300.

And i thought there was only one odor question.

bonduck

Wait, why would it stay in the water?

"KI, which is a polar, ionic compound, will ionize and dissolve in water. When
KI dissolves in water, it ionizes to K(+) and I(-)."

Iodine Solubility with KI

feynman81591

anybody remember any of the TTCE's. i think i also got 5 but i forgot all the questions lol. except for benzene. it was true then false. that section as a whole was pretty easy. i am just praying that i didnt slip. did you guys get any "TTs" without "CE"? i dont think i did but i forgot that part because i sped through it.

feynman81591

no, but you wanna separate it from iron filings and sand too. water alone cannot do that. you need a filtrate to further separate the extra **** from the solution.

thequestionmark

bonduck

If you add water, you dissolve the KI. How would that separate things? You still have the filing sand sand in there.

The best method is take a net, and filter out the solids, which leaves you with KI.

feynman81591

oh wow, i was just censored. haha. anyway, a sieve would be a good filtering device.

anybody get that a crucible would be useless in titration?

and atomic radius increases with the atomic number increase in halogens.

mercury had the smallest specific heat and thus is most susceptible to temp change.

bonduck

Feynman: yep, I got the same answers as you