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Topic: Which is false about the following net ionic equation?  (Read 2597 times)

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Offline big

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Which is false about the following net ionic equation?
« on: November 28, 2011, 10:54:36 PM »
Which of the following statements is FALSE given the following net ionic equation?

2H+(aq) + Cu(OH)2(s)  :rarrow: Cu2+ (aq) + 2 H2O(l)

A) If all the water evaporated away, the salt remaining could possibly be Cu(C2H3O2)2.
B) The acid is a strong electrolyte.
C) Cu(OH)2 is insoluble.
D) This is classified as a neutralization reaction.

I know that the answer is A, but I'd like to know why. I at first thought that maybe it's because the acetate ion and the copper ion remain in solution, but then I thought about it some more and realized that it does say that all the water evaporates. So what is the actual reason then? Does it have to do with the fact that acetic acid is a weak acid?

Offline Borek

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Re: Which is false about the following net ionic equation?
« Reply #1 on: November 29, 2011, 04:43:49 AM »
Net ionic equation doesn't say anything about the identity of the acid used.
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Offline big

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Re: Which is false about the following net ionic equation?
« Reply #2 on: November 29, 2011, 11:05:11 PM »
Thanks. I knew that it wasn't for sure copper acetate, but I guess I had interpreted the question so that by picking A, you were saying that it was impossible for it to be copper acetate.

Offline Dan

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Re: Which is false about the following net ionic equation?
« Reply #3 on: November 30, 2011, 02:46:56 AM »
Slightly dodgy question I think.

C and D are certainly true. A and B could be true or false - but A and B cannot both be true or both be false - it has to be one or the other. A is basically saying, "the acid could be acetic acid (weak acid)", and B says, "the acid is a strong acid".

I imagine that the person who wrote the question wants A as the answer because a net ionic equation shows H+, the idea being that this implies that the acid is fully dissociated and therefore a strong one.
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