[aft]

are these compunds (aq) or (s) or (g) ??

Ba(OH)₂

BaI₂

FeI₂

thanks for your *delete me*!

[Mitch]

They look like solids. But you an use the MSDS blocks to your lower left to make sure.

[aft]

jus wondering...how'd u determine they were solids by looking..?  

[mike]

Almost all ionic compounds are solids (s)

Many of them dissolve in water to become aqueous ions, for example table salt NaCl (sodium chloride) is a solid (white crystaline solid you have probably had on fries etc). So NaCl_(s) is a solid at room temperature, when you put it in water however it becomes sodium ions Na⁺_(aq) and chloride ions Cl^-_(aq).

Many gases are covalent compounds and not ionic, for example O₂ and N₂.

Often the state that a compound is in will be determined by things like temperature or pressure (or both)

[aft]

well, in the sense of this reaction:

FeSO_{4 (aq)} + 2KI _(aq) --> FeI₂ + K₂SO₄

would FeI₂ still be a solid or would it be (aq)?
 

[mike]

Presuming that this is in water:

K2SO4 is soluble 24.1g per 100mL

and

FeI2 is soluble in cold and hot water.

So most probably it would be (aq) FeI_2(aq)

You can look up solubilities of most compounds, I looked in the CRC handbook for these. Maybe some of the search boxes on the left might help too.

[aft]

hmm....i c... its (aq) then....

i checked the boxes and they all tell me its a solid of sorts... but i guess its assuming that it isn't in solution....

anyways, thanks a bunch for your *delete me*!  :jump:

[AWK]

are these compunds (aq) or (s) or (g) ??

Ba(OH)₂

BaI₂

FeI₂

thanks for your *delete me*!

It depends on temperature. At RT they are solids

[mike]

It depends on temperature. At RT they are solids

Unless they are in water, as we already stated above.