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Using Tables F & G. Table F problems Solubility guidelines for ionic substances in water –solubility ranges from very low solubility (basically insoluble)

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Presentation on theme: "Using Tables F & G. Table F problems Solubility guidelines for ionic substances in water –solubility ranges from very low solubility (basically insoluble)"— Presentation transcript:

1 Using Tables F & G

2 Table F problems Solubility guidelines for ionic substances in water –solubility ranges from very low solubility (basically insoluble) to very soluble Use table F guidelines to predict if a given compound is soluble or insolubleUse table F guidelines to predict if a given compound is soluble or insoluble

3 To use Table F Separate the ionic compound into the positive ion and the negative ionSeparate the ionic compound into the positive ion and the negative ion Scan for both in Table FScan for both in Table F Left side of Table F shows soluble compounds with exceptionsLeft side of Table F shows soluble compounds with exceptions Right side of Table F shows insoluble compounds with exceptionsRight side of Table F shows insoluble compounds with exceptions

4 Predict solubility of LiClLiCl NH 4 FNH 4 F Ca(HCO 3 ) 2Ca(HCO 3 ) 2 BaSO 4BaSO 4 K 2 CO 3K 2 CO 3 CaCO 3CaCO 3 Mg 3 (PO 4 ) 2Mg 3 (PO 4 ) 2 Ca(OH) 2Ca(OH) 2 Soluble – cmpd with a Group 1 ion Soluble – cmpd with NH 4 + Soluble – cmpd with HCO 3 - Insoluble – sulfates with Ba + Soluble – cmpd with a Group 1 ion Insoluble - most carbonates Insoluble – most phosphates Soluble – hydroxide with Ca +2

5 Why do we need to predict solubility? To determine the precipitate in a double replacement reactionTo determine the precipitate in a double replacement reaction

6 Predicting Products AgNO 3 (aq) + KCl(aq) ? AgCl(s) + KNO 3 (aq)

7 Table G problems Shows amount of solute or solvent required for a given amount of the otherShows amount of solute or solvent required for a given amount of the other –Involves setting up a proportion Precipitation problemsPrecipitation problems

8 How much KCl will dissolve in 300 grams of water at 50 C? Use the graph to set up a proportion 42 g KCl = 100 g H 2 O X g KCl 300 g H 2 O Problem:

9 Finding amount Solute 42 g KCl X g KCl 42 g KCl X g KCl 100 g H 2 O 300 g H 2 O 100 g H 2 O 300 g H 2 O X = 126 g KCl X = 126 g KCl =

10 How much H 2 O is required to just dissolve 200 g NaNO 3 at 20 C? 88 g NaNO 3 = 100 g H 2 O 200 g NaNO 3 X g of H 2 O

11 Finding amount H 2 O 88 g NaNO 3 = 200 g NaNO g H 2 O X g H 2 O X = g H 2 O X = g H 2 O

12 Precipitation problems A saturated solution of KNO 3 is prepared in 100 g of water at 50 C and then cooled down to 10 C. How much KNO 3 will precipitate?A saturated solution of KNO 3 is prepared in 100 g of water at 50 C and then cooled down to 10 C. How much KNO 3 will precipitate?

13 88 g KNO 3 in 100 g H 2 O at 50 C. 20 g KNO 3 in 100 g H 2 O at 10 C. 88 g – 20 g = 68 g KNO 3 precipitates.


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