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
left side shows soluble cmpds & exceptions
right side shows insoluble cmpds & exceptions

3. predict solubility of LiCl NH4F Ca(HCO3)2 BaSO4 K2CO3 CaCO3 Mg3(PO4)2
Ca(OH)2
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

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

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