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Topic: Species in Solution  (Read 6833 times)

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Offline AWK

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Re: Species in Solution
« Reply #15 on: October 15, 2012, 06:45:46 AM »
Quote
what species would I expect in solution in order of  decreasing concentration?
In water solution of sodium acetate you have a few moles of sodium acetate in 1 liter and ~50 moles of water.
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Offline Messi

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Re: Species in Solution
« Reply #16 on: October 15, 2012, 07:43:55 AM »
Quote
what species would I expect in solution in order of  decreasing concentration?
In water solution of sodium acetate you have a few moles of sodium acetate in 1 liter and ~50 moles of water.

Ok, yes, I agree with that. So to reformat my table, I would put:

H2O
CH3COONa
CH3COO- & Na+
CH3COOH
NaOH
H+ & OH-

Offline Borek

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Re: Species in Solution
« Reply #17 on: October 15, 2012, 08:17:14 AM »
CH3COO + H20  :rarrow: CH3COOH + OH

Stop omitting charges.

If there is an OH- produced per each CH3COOH produced, is it possible that the concentration of OH- is much lower than the concentration of CH3COOH?
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Offline Messi

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Re: Species in Solution
« Reply #18 on: October 15, 2012, 09:50:56 AM »
Good point Borek. Sorry for omitting charges.

I guess my final table in order of decreasing concentrations should read:

H2O
CH3COONa
CH3COO- & Na+
H+ & OH- & NaOH & CH3COOH

I am not sure if there would be the same amount concentrations of CH3COONa and CH3COO- & Na+.

Offline Borek

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Re: Species in Solution
« Reply #19 on: October 15, 2012, 09:56:10 AM »
You were told more than once that CH3COONa is dissociated 100%, yet you still list it as the second most important species.
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Offline Messi

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Re: Species in Solution
« Reply #20 on: October 15, 2012, 10:22:32 AM »
My apologies.

H2O
CH3COO- & Na+
H+ & OH- & NaOH & CH3COOH

Seems correct I guess.

Thank you for correcting me Borek. As you can tell, I am not very brilliant.

Offline Messi

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Re: Species in Solution
« Reply #21 on: October 15, 2012, 11:56:24 AM »
My apologies.

H2O
CH3COO- & Na+
H+ & OH- & NaOH & CH3COOH

Seems correct I guess.

Thank you for correcting me Borek. As you can tell, I am not very brilliant.

After thinking for a long time, I would probably change my answer to:

H2O
CH3COO- & Na+
OH-
CH3COOH
H+

What do you guys think?

Offline Borek

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Re: Species in Solution
« Reply #22 on: October 15, 2012, 12:07:00 PM »
Much better.
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Offline Messi

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Re: Species in Solution
« Reply #23 on: October 15, 2012, 01:03:35 PM »
Much better.

Is "much better" 100% correct? :)

Offline Borek

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Re: Species in Solution
« Reply #24 on: October 15, 2012, 01:32:18 PM »
Exact answer depends on how much you are expected to know and what level of details you were already taught. At some level this is a 100% correct answer, at other levels it is incomplete.
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Offline Messi

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Re: Species in Solution
« Reply #25 on: October 15, 2012, 08:00:10 PM »
And at some levels it's wrong! ;)

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