Chemistry

[Predentknight]

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First I would like to ask people that have the Kaplan online component. Is it me, or, are subject tests 3,4 and 5 extremely difficult. I have not broken over 55% on any of them. I would like to know how other people are feeling about these subject tests.

Question:

Zn + NaNO3 --> no rxn

Can somebody explain this, I read through all of the solubility rules and found nothing that relates to this rxn.

 

[doc3232]

First I would like to ask people that have the Kaplan online component. Is it me, or, are subject tests 3,4 and 5 extremely difficult. I have not broken over 55% on any of them. I would like to know how other people are feeling about these subject tests.

Question:

Zn + NaNO3 --> no rxn

Can somebody explain this, I read through all of the solubility rules and found nothing that relates to this rxn.

Did you ask this question about 4 days ago?

 

[Predentknight]

It was not me but if someone had asked the same question can you please post the reply.

 

[dentalplan]

First I would like to ask people that have the Kaplan online component. Is it me, or, are subject tests 3,4 and 5 extremely difficult. I have not broken over 55% on any of them. I would like to know how other people are feeling about these subject tests.

Question:

Zn + NaNO3 --> no rxn

Can somebody explain this, I read through all of the solubility rules and found nothing that relates to this rxn.

If you can find a solubility rules chart, or something like that, then your answer should be in there. Zinc, a transition metal, can in fact be found in various aqueous solutions. It usually appears as Zn(2+).

When zinc is combined with NaNO3, there is no reaction because zinc doesn't form a precipitate with NO3(-). In order for there to be a reaction, you have to have a precipitate. Zinc, for the most part CAN form a precipitate with OH-, CO3(2-), and PO4(3-), but it generally CAN'T form precipitates with NO3(-), Cl-, and SO4(2-). And if it doesn't make a precipitate, then you don't get a reaction -- they just stay in solution as spectator ions.