posted by Jeffery on .
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
Sorry, I meant Ba(NO3)2 in the question
Neither Ba(NO3)2 nor Ca(NO3)2 has a Ksp.
What do you mean? Sorry this question is really confusing me
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.
Oh ok, do you think its just a typo? My teacher said that it is realatively soluble, but more insoluble than other nitrate salts
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.
Great! Thanks for your help