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Topic: AP test  (Read 248408 times)

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Offline mrdeadman

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Re: AP test
« Reply #90 on: May 09, 2006, 11:57:32 PM »
Quote from: syko sykes on May 09, 2006, 11:55:49 PM
how do you know the metal is Cr3+?
i have a standard reduction potentials in aqueous solution at 25C sheet and Cr3+ is -0.74
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Offline rctrackstar2007

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Re: AP test
« Reply #91 on: May 09, 2006, 11:58:15 PM »
if you take cathode as negative, you accept conventional current for this. so the anode flows to the cathode (- to +)
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The world is like an atom. The not-quite-as-intelligent people are the nucleus all packed together sharing a common...everything. We, we are the electrons. Granted we're not as smart as these engineers and what-not so we're most likely in the first orbital, but we're the electrons of this giant atom. We all have differing intelligences and ideas and we are separated from the nucleus which makes us better because no one really cares about how a nucleus acts. It's the electrons that make chemistry, except for nuclear chem, of course, which I am a big fan of.

-Your's truly, 2006;
  written to describe the HS chem student apart from the average being

Offline mrdeadman

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Re: AP test
« Reply #92 on: May 09, 2006, 11:58:33 PM »
Quote from: rctrackstar2007 on May 09, 2006, 11:57:00 PM
Quote from: tennis freak on May 09, 2006, 11:55:13 PM
what is the difference between diprotic and monoprotic?

diprotic means 2 H+ ions and mono means 1 H+ ions...

someone check me on that
yeah... that's right. diprotic, two protons to lose.
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Offline rctrackstar2007

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Re: AP test
« Reply #93 on: May 09, 2006, 11:59:16 PM »
Quote from: mrdeadman on May 09, 2006, 11:58:33 PM
Quote from: rctrackstar2007 on May 09, 2006, 11:57:00 PM
Quote from: tennis freak on May 09, 2006, 11:55:13 PM
what is the difference between diprotic and monoprotic?

diprotic means 2 H+ ions and mono means 1 H+ ions...

someone check me on that
yeah... that's right. diprotic, two protons to lose.

damn it feels good to be right for once lol
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AP Chemistry Squad Member [002]

The world is like an atom. The not-quite-as-intelligent people are the nucleus all packed together sharing a common...everything. We, we are the electrons. Granted we're not as smart as these engineers and what-not so we're most likely in the first orbital, but we're the electrons of this giant atom. We all have differing intelligences and ideas and we are separated from the nucleus which makes us better because no one really cares about how a nucleus acts. It's the electrons that make chemistry, except for nuclear chem, of course, which I am a big fan of.

-Your's truly, 2006;
  written to describe the HS chem student apart from the average being

Offline tennis freak

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Re: AP test
« Reply #94 on: May 10, 2006, 12:00:18 AM »
if you combine NaI and PB2+ do you get a yellow precipitate or would it be yellow with CrO42-?
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Offline mrdeadman

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Re: AP test
« Reply #95 on: May 10, 2006, 12:00:35 AM »
we will get a formulas sheet right?
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Offline syko sykes

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Re: AP test
« Reply #96 on: May 10, 2006, 12:01:00 AM »
Quote from: mrdeadman on May 09, 2006, 11:57:32 PM
Quote from: syko sykes on May 09, 2006, 11:55:49 PM
how do you know the metal is Cr3+?
i have a standard reduction potentials in aqueous solution at 25C sheet and Cr3+ is -0.74
can i assume we will be given that sheet on the test tomorrow?
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Offline mrdeadman

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Re: AP test
« Reply #97 on: May 10, 2006, 12:01:38 AM »
Quote from: tennis freak on May 10, 2006, 12:00:18 AM
if you combine NaI and PB2+ do you get a yellow precipitate or would it be yellow with CrO42-?
you get PbI2
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Offline rctrackstar2007

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Re: AP test
« Reply #98 on: May 10, 2006, 12:01:55 AM »
Quote from: mrdeadman on May 10, 2006, 12:00:35 AM
we will get a formulas sheet right?

you get anything you will need except a calculator which they have extras of
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AP Chemistry Squad Member [002]

The world is like an atom. The not-quite-as-intelligent people are the nucleus all packed together sharing a common...everything. We, we are the electrons. Granted we're not as smart as these engineers and what-not so we're most likely in the first orbital, but we're the electrons of this giant atom. We all have differing intelligences and ideas and we are separated from the nucleus which makes us better because no one really cares about how a nucleus acts. It's the electrons that make chemistry, except for nuclear chem, of course, which I am a big fan of.

-Your's truly, 2006;
  written to describe the HS chem student apart from the average being

Offline mrdeadman

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Re: AP test
« Reply #99 on: May 10, 2006, 12:02:18 AM »
Quote from: syko sykes on May 10, 2006, 12:01:00 AM
can i assume we will be given that sheet on the test tomorrow?
that's the only way in hell i would ever be able to get a question like that right.
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Offline syko sykes

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Re: AP test
« Reply #100 on: May 10, 2006, 12:02:27 AM »
Quote from: tennis freak on May 10, 2006, 12:00:18 AM
if you combine NaI and PB2+ do you get a yellow precipitate or would it be yellow with CrO42-?
doesn't sodium burn yellow and chromate burn purple or something like that?
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Offline rctrackstar2007

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Re: AP test
« Reply #101 on: May 10, 2006, 12:04:02 AM »
Quote from: syko sykes on May 10, 2006, 12:02:27 AM
Quote from: tennis freak on May 10, 2006, 12:00:18 AM
if you combine NaI and PB2+ do you get a yellow precipitate or would it be yellow with CrO42-?
doesn't sodium burn yellow and chromate burn purple or something like that?

the sodium yes for sure but i haven't burned chromate before so i don't know
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AP Chemistry Squad Member [002]

The world is like an atom. The not-quite-as-intelligent people are the nucleus all packed together sharing a common...everything. We, we are the electrons. Granted we're not as smart as these engineers and what-not so we're most likely in the first orbital, but we're the electrons of this giant atom. We all have differing intelligences and ideas and we are separated from the nucleus which makes us better because no one really cares about how a nucleus acts. It's the electrons that make chemistry, except for nuclear chem, of course, which I am a big fan of.

-Your's truly, 2006;
  written to describe the HS chem student apart from the average being

Offline mrdeadman

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Re: AP test
« Reply #102 on: May 10, 2006, 12:04:29 AM »
Quote from: syko sykes on May 10, 2006, 12:02:27 AM
doesn't sodium burn yellow and chromate burn purple or something like that?
i don't know but i just read the question again, and no, the precipitant isn't yellow, it is with the CrO4 though. dichromate is red. or is it the other way around?
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Offline mrdeadman

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Re: AP test
« Reply #103 on: May 10, 2006, 12:04:55 AM »
sykes got second page ownage. :P
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Offline rctrackstar2007

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Re: AP test
« Reply #104 on: May 10, 2006, 12:04:59 AM »
Quote from: mrdeadman on May 10, 2006, 12:02:18 AM
Quote from: syko sykes on May 10, 2006, 12:01:00 AM
can i assume we will be given that sheet on the test tomorrow?
that's the only way in hell i would ever be able to get a question like that right.

lol i agree

i hate those odd ones like chromate and dichromate and stuff
Logged
AP Chemistry Squad Member [002]

The world is like an atom. The not-quite-as-intelligent people are the nucleus all packed together sharing a common...everything. We, we are the electrons. Granted we're not as smart as these engineers and what-not so we're most likely in the first orbital, but we're the electrons of this giant atom. We all have differing intelligences and ideas and we are separated from the nucleus which makes us better because no one really cares about how a nucleus acts. It's the electrons that make chemistry, except for nuclear chem, of course, which I am a big fan of.

-Your's truly, 2006;
  written to describe the HS chem student apart from the average being
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