Using Tables F & G

1. Using Tables F & G

2. Table F problems • Solubility guidelines for substances in water • solubility ranges from very low solubility (basically insoluble) to very soluble • table F: use to predict if compound is soluble or insoluble • Leftside shows solublecmpnds & exceptions • Right side shows insolublecmpnds & exceptions

3. Soluble – cmpd with a Group 1 ion Soluble – cmpd with NH4+1 Soluble – cmpd with HCO3-1 Insoluble – sulfates with Ba+2 Soluble – cmpd with a Group 1 ion Insoluble - most carbonates Insoluble – most phosphates Soluble – hydroxide with Ca+2 Predict solubility of • LiCl • NH4F • Ca(HCO3)2 • BaSO4 • K2CO3 • CaCO3 • Mg3(PO4)2 • Ca(OH)2

4. Use Table F to determine solubility of products formed in DR rxns

5. Predicting Products AgNO3(aq) + KCl(aq)  ? (s) (aq) AgCl KNO3 +

6. Table G problems • shows amount solute required for given amount of solvent Or • shows amount solvent required for given amount of solute • Involves setting up a proportion

7. Problem: How much KCl will dissolve in 300 grams of water at 50C? Use the graph to set up a proportion 42 g KCl = X g KCl 100 g H2O 300 g H2O X = 126g KCl

8. How much H2O is required to just dissolve 200 g NaNO3 at 20C? 88 g NaNO3 = 100 g H2O 200 g NaNO3 X g of H2O X = 227.3 g H2O

9. Ex: precipitation word problem • A saturated solution of KNO3 is prepared in 100 g of water at 50C and then cooled down to 10C. How much KNO3 will precipitate?

10. 88 g KNO3 in 100 g H2O at 50C 20 g KNO3 in 100 g H2O at 10C 88 g – 20 g = 68 g KNO3 precipitates