November 22, 2024, 08:44:06 PM
Forum Rules: Read This Before Posting


« previous next »
Pages: 1 ... 4 5 [6] 7 8 ... 20   Go Down

Topic: AP test  (Read 248438 times)

0 Members and 8 Guests are viewing this topic.

Offline mrdeadman

  • Full Member
  • ****
  • Posts: 262
  • Mole Snacks: +23/-39
  • I got a 5. Hooray!
Re: AP test
« Reply #75 on: May 09, 2006, 11:51:16 PM »
ok, what's the net-ionic equation? cr3+ + Sn -> Cr + Sn2+
Logged
AP Chemistry Squad Member [001]

Offline syko sykes

  • Full Member
  • ****
  • Posts: 128
  • Mole Snacks: +12/-10
  • Gender: Male
Re: AP test
« Reply #76 on: May 09, 2006, 11:51:57 PM »
for part d, would the metal be Se? or maybe Te?

G is gibbs free energy... doesn't a positive delta G mean the reaction is spontaneous?
Logged
AP Chemistry Squad Member [V]

Offline mrdeadman

  • Full Member
  • ****
  • Posts: 262
  • Mole Snacks: +23/-39
  • I got a 5. Hooray!
Re: AP test
« Reply #77 on: May 09, 2006, 11:52:34 PM »
Quote from: tennis freak on May 09, 2006, 11:49:42 PM
what exactly is delta G and delta S
delta g is gibbs free energy-tells spontaneity of reaction, delta s is entropy-tells how orderly the products are in relation to the reactants.
Logged
AP Chemistry Squad Member [001]

Offline rctrackstar2007

  • Full Member
  • ****
  • Posts: 265
  • Mole Snacks: +18/-40
  • Gender: Male
  • I need scoobie snacks and a 5 on the test!
Re: AP test
« Reply #78 on: May 09, 2006, 11:53:14 PM »
Quote from: tennis freak on May 09, 2006, 11:50:54 PM
didn't tesdahl say that the e- flow opposite of current which means they go from anode to cathode right?

exactly!!
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

Offline mrdeadman

  • Full Member
  • ****
  • Posts: 262
  • Mole Snacks: +23/-39
  • I got a 5. Hooray!
Re: AP test
« Reply #79 on: May 09, 2006, 11:53:19 PM »
Quote from: syko sykes on May 09, 2006, 11:51:57 PM
for part d, would the metal be Se? or maybe Te?

G is gibbs free energy... doesn't a positive delta G mean the reaction is spontaneous?
Cr3+
and a positive delta g is nonspontaneous.
Logged
AP Chemistry Squad Member [001]

Offline tennis freak

  • Full Member
  • ****
  • Posts: 107
  • Mole Snacks: +10/-9
Re: AP test
« Reply #80 on: May 09, 2006, 11:53:34 PM »
i thought that if delta g was negative that meant it was spontaneous
Logged
AP Chemistry Squad Member [004]

Don't be afraid to try something new, remember amateurs built the ark and professionals built the titanic!

Offline syko sykes

  • Full Member
  • ****
  • Posts: 128
  • Mole Snacks: +12/-10
  • Gender: Male
Re: AP test
« Reply #81 on: May 09, 2006, 11:54:05 PM »
Quote from: tennis freak on May 09, 2006, 11:50:54 PM
didn't tesdahl say that the e- flow opposite of current which means they go from anode to cathode right?
electrons flow from negative to positive bcuase of attraction... conventional current is opposite of that
Logged
AP Chemistry Squad Member [V]

Offline mrdeadman

  • Full Member
  • ****
  • Posts: 262
  • Mole Snacks: +23/-39
  • I got a 5. Hooray!
Re: AP test
« Reply #82 on: May 09, 2006, 11:54:42 PM »
Quote from: tennis freak on May 09, 2006, 11:53:34 PM
i thought that if delta g was negative that meant it was spontaneous
i beat you to it aHA! :o
Logged
AP Chemistry Squad Member [001]

Offline tennis freak

  • Full Member
  • ****
  • Posts: 107
  • Mole Snacks: +10/-9
Re: AP test
« Reply #83 on: May 09, 2006, 11:55:13 PM »
what is the difference between diprotic and monoprotic?
Logged
AP Chemistry Squad Member [004]

Don't be afraid to try something new, remember amateurs built the ark and professionals built the titanic!

Offline rctrackstar2007

  • Full Member
  • ****
  • Posts: 265
  • Mole Snacks: +18/-40
  • Gender: Male
  • I need scoobie snacks and a 5 on the test!
Re: AP test
« Reply #84 on: May 09, 2006, 11:55:18 PM »
Quote from: tennis freak on May 09, 2006, 11:49:42 PM
what exactly is delta G and delta S

neg delta S means the reaction becomes more entropoetic (??wordage??) as it proceeds

neg delta G means spontaneous
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

Offline mrdeadman

  • Full Member
  • ****
  • Posts: 262
  • Mole Snacks: +23/-39
  • I got a 5. Hooray!
Re: AP test
« Reply #85 on: May 09, 2006, 11:55:36 PM »
Quote from: syko sykes on May 09, 2006, 11:54:05 PM
Quote from: tennis freak on May 09, 2006, 11:50:54 PM
didn't tesdahl say that the e- flow opposite of current which means they go from anode to cathode right?
electrons flow from negative to positive bcuase of attraction... conventional current is opposite of that
yeah but which is which, anode positive or negative? im thinking negative but not sure.
Logged
AP Chemistry Squad Member [001]

Offline syko sykes

  • Full Member
  • ****
  • Posts: 128
  • Mole Snacks: +12/-10
  • Gender: Male
Re: AP test
« Reply #86 on: May 09, 2006, 11:55:49 PM »
how do you know the metal is Cr3+?
Logged
AP Chemistry Squad Member [V]

Offline tennis freak

  • Full Member
  • ****
  • Posts: 107
  • Mole Snacks: +10/-9
Re: AP test
« Reply #87 on: May 09, 2006, 11:56:51 PM »
anode is the negative
Logged
AP Chemistry Squad Member [004]

Don't be afraid to try something new, remember amateurs built the ark and professionals built the titanic!

Offline rctrackstar2007

  • Full Member
  • ****
  • Posts: 265
  • Mole Snacks: +18/-40
  • Gender: Male
  • I need scoobie snacks and a 5 on the test!
Re: AP test
« Reply #88 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
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

Offline syko sykes

  • Full Member
  • ****
  • Posts: 128
  • Mole Snacks: +12/-10
  • Gender: Male
Re: AP test
« Reply #89 on: May 09, 2006, 11:57:08 PM »
Quote from: mrdeadman on May 09, 2006, 11:55:36 PM
Quote from: syko sykes on May 09, 2006, 11:54:05 PM
Quote from: tennis freak on May 09, 2006, 11:50:54 PM
didn't tesdahl say that the e- flow opposite of current which means they go from anode to cathode right?
electrons flow from negative to positive bcuase of attraction... conventional current is opposite of that
yeah but which is which, anode positive or negative? im thinking negative but not sure.
cathode is positive and anode is negative
Logged
AP Chemistry Squad Member [V]
Pages: 1 ... 4 5 [6] 7 8 ... 20   Go Up
« previous next »
Sponsored Links