Calculate te calue of Ksp for Ca(NO3)2 using the data below.
Ba(aq) delta G0f= -561 kJ/mol
NO3 (aq) delta G0f= -109 kJ/mol
BaNO3 (s) delta G0f= -797 kJ/mol
chemistry - Jeffery, Saturday, November 27, 2010 at 5:12pm
Sorry, I meant Ba(NO3)2 in the question
chemistry - DrBob222, Saturday, November 27, 2010 at 5:54pm
Neither Ba(NO3)2 nor Ca(NO3)2 has a Ksp.
chemistry - Jamy, Saturday, November 27, 2010 at 5:57pm
What do you mean? Sorry this question is really confusing me
chemistry - DrBob222, Saturday, November 27, 2010 at 6:06pm
Ba(NO3)2 is quite soluble. Solubility products, at least what I've been led to believe all these years, are good for slightly soluble materials only.
I've never seen a Ksp listed for Ba(NO3)2 in any table I've consulted in the past 60 years.
chemistry - Jeffery, Saturday, November 27, 2010 at 6:11pm
Oh ok, do you think its just a typo? My teacher said that it is realatively soluble, but more insoluble than other nitrate salts
chemistry - DrBob222, Saturday, November 27, 2010 at 8:51pm
This may answer some of your questions.
I looked on the web and found the solubility of Ba(NO3)2 as about 131 grams/L @ zero C and about double that at room temperature. I also found reference to the Ba(NO3)2 Ksp? (link above) plus another one on NaCl etc. Frankly, I don't think this is a strict solubility product; however, it is being used that way, and within reason, should work about the same way in saturated solutions of the salt. I think the bove link will answer most of your questions. I note there is a section on calculation delta G and that may help you also.
chemistry - Jeffery, Tuesday, November 30, 2010 at 10:31am
Great! Thanks for your help