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Old 05-11-2008, 04:24 PM   #1
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Ap chem help
i know weak electrolytes dont ionize completely in water, but say you have CH3COOH (acetic acid) and you are doing a net ionic equation. does the H+ separate? or does it stay as acetic acid? Thanks
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Old 05-11-2008, 04:30 PM   #2
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Because acetic acid is a weak acid, you do not separate H+ and CH3COO- in a net ionic equation.

You have to separate ions only if it's a strong acid.
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Old 05-11-2008, 04:36 PM   #3
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thanks for the help
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Old 05-11-2008, 04:53 PM   #4
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i have another question, if you mix tin chloride with iron chloride, what would the products be? i get confused when both reactants have the same ion in it
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Old 05-11-2008, 05:16 PM   #5
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it sounds like it will form a complex.


i don't think any complex ions will be on the ap exam though.
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Old 05-11-2008, 05:48 PM   #6
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REALLY? i just learned the complex ion formation. Its pretty simple. Darn i suck at double replacement. er i suck
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Old 05-11-2008, 06:03 PM   #7
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well double displacement is written differently in net ionic form which BLOWS because it takes a lot to get used to it.
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Old 05-11-2008, 06:04 PM   #8
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I HATE how we have to write a net ionic. Stupid spectator ions always get me.
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Old 05-11-2008, 06:44 PM   #9
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Question! When writing a net ionic, do I balance the equation before or after removing spectator ions?
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Old 05-11-2008, 06:52 PM   #10
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COMPLEX IONS WILL BE ON THE TEST--especially the "predict the reaction" part
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Old 05-11-2008, 06:52 PM   #11
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You only have space to submit one line of an answer. That is the balanced net ionic equation. I do them in a few steps. Just use the sheet with the questions on it as scrap paper. First predict the products on the first line. Then balance the equation. Then break up compounds into ions if they dissolve. Then remove spectator ions. Then put that line in the answer box!!
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Old 05-11-2008, 06:52 PM   #12
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the ap test dont require you to balance the equations
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Old 05-11-2008, 06:54 PM   #13
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Yeah you do. Along with the other 2 changes they made in 2007, you know are required to submit the balanced net ionic equation.
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Old 05-11-2008, 09:03 PM   #14
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great. this is really really great.
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Old 05-11-2008, 09:06 PM   #15
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braves09 - if you see something like tin chloride and iron chloride (same anion), regular double replacement doesn't work. Do a redox. Example would be tin(II) chloride + iron(III) chloride. Notice that tin can go up in oxidation number (to +4) and iron can go down (to +2). Therefore

Sn(2+) + 2 Fe(3+) --> Sn(4+) + 2Fe(2+)
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