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4hv.org :: Forums :: General Chatting
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AP CHEM

1 2 
Move Thread LAN_403
Jim
Wed May 10 2006, 07:41PM Print
Jim Dunce.
Registered Member #28 Joined: Fri Feb 03 2006, 03:29AM
Location:
Posts: 76
Who got the question AgCl + HCl => ????

Also, Phosphine + Ammonia => ????
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...
Wed May 10 2006, 11:14PM
... Registered Member #56 Joined: Thu Feb 09 2006, 05:02AM
Location: Southern Califorina, USA
Posts: 2445
good thing we only had to do 5 of them cheesey

I skipped those two, but I believe that the AgCl + HCL formed some type of complex ion like
AgCl + Cl- ->AgCl2-

The other is weird too, but since it has a little ligand so it seems like a complex ion I guess...
PH3 + NH3 -> H4[NH4P2] but I don't know

I might ask tomorrow...

Just out of curiosity, which of the optional ones did you choose?
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Jim
Thu May 11 2006, 01:30AM
Jim Dunce.
Registered Member #28 Joined: Fri Feb 03 2006, 03:29AM
Location:
Posts: 76
Cu2+ cause that was easy, um, I screwed up the hexane one, I said C6H12 instead of H14, I did the um, cobalt? hydroxide one, uh, boron trichloride and something, etc etc.
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joshua_
Thu May 11 2006, 02:23AM
joshua_ Registered Member #61 Joined: Thu Feb 09 2006, 05:50AM
Location: Mountain View, CA
Posts: 43
I don't remember shit about the reaction prediction... but that was probably the section I did the worst on.

Section 2 and 8 here (equilibrium one and "element Q") -- what did you guys do?
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Jim
Thu May 11 2006, 02:42AM
Jim Dunce.
Registered Member #28 Joined: Fri Feb 03 2006, 03:29AM
Location:
Posts: 76
PbI2 and Q
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...
Thu May 11 2006, 03:34AM
... Registered Member #56 Joined: Thu Feb 09 2006, 05:02AM
Location: Southern Califorina, USA
Posts: 2445
I think I got the 5 reactions, we had a reaction quiz worth about 1/2 a multichaper test every other week (which I get about 1/2 of the reactions = C- on) so we got to know then quite well. Err, most of us did, I was too lazy to memorise all of the weird ones. good thing you only need to know 5...

I did the % comp of the C/H/N/O problem since it was just too easy to pass up (and I suck at thermo), and the element Q since the other one seemed confusing cheesey
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Jim
Thu May 11 2006, 10:58AM
Jim Dunce.
Registered Member #28 Joined: Fri Feb 03 2006, 03:29AM
Location:
Posts: 76
Yeah I did the CHNO and was running WAY out of time, I think I screwed my numbers somewhere, I got like C25H25N14O2 or something..
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...
Thu May 11 2006, 02:04PM
... Registered Member #56 Joined: Thu Feb 09 2006, 05:02AM
Location: Southern Califorina, USA
Posts: 2445
Don't feel too bad, usually they will give you full points for having the right work but wrong numbers cheesey

You can get teh old scoring guides off the college board website to see how they do it.
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...
Tue Jul 04 2006, 07:48PM
... Registered Member #56 Joined: Thu Feb 09 2006, 05:02AM
Location: Southern Califorina, USA
Posts: 2445
Well, scores should arrive soon... How did you do?

I got a 5 shades I also got a 770/800 on the sat subject test for chem tongue
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joshua_
Thu Jul 06 2006, 01:06AM
joshua_ Registered Member #61 Joined: Thu Feb 09 2006, 05:50AM
Location: Mountain View, CA
Posts: 43
5, and 760 on SAT2 (took it last year).

After the test, our AP chem class quickly became useless. We had a rocket lab. Some things to note... Safety precautions are "different" with Mr. Hatch (name changed to protect the awesome). In particular:

  • With most groups of rocketeers, the person launching stands as far back as the cord will allow, and everyone else is lying on the ground. With Mr. Hatch's class, we're all about 7 or 8 feet in a semicircle standing around it.
  • With most groups of rocketeers, the person launching checks that the area is clear, and counts down from 10, then carefully hits the button. With Mr. Hatch's class, the person launching does a cursory examination to make sure that the person connecting the wires is clear (but mainly because they're the only holding the safety key), yells "FIRE IN THE HOLE!", and hits the button.
  • With most groups of rocketeers, only well-formed rockets are launched. With Mr. Hatch's class, we spent two class days and a lab block building these; it would be a waste not to launch them! Who cares if they only have one fin?


Really, it's not as unsafe as it sounds; those motors haven't much thrust, and by the time they'd hit us, they wouldn't've built up much speed.

You can see a video of the resulting doom (and hear Crazy Mr. Hatch's laugh!) on my site.

Other fun labs were the silver beaker lab and the ice cream lab. I have photos/video of the silver beaker lab if anyone's interested...
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