Solubility

Solubility Curves

show how much solute will dissolve in water at a given temperature

Table G shows a solubility curve

Solubility Curves for Gases

As temperature goes up,gases become less solublein water

Solubility Curves for solids

As temperature goes up,solids become more solublein water

How many grams of potassium nitrate will dissolve in 100 g of water at 50 degrees C?

85 grams

How many grams of potassium nitrate will dissolve in 300 g of water at 50 degrees C?

85 grams x 3 = 255 grams

How many moles of potassium nitrate will dissolve in 100 g of water at 50 degrees C?

85 grams = ? moles

K = 39gN = 14 gO3= 48g

KNO3 = 101 g/mol85g/101g/mol =.84 moles

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On the curve =Saturated solution

XUnder the curve =Unsaturated solution

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Above the curve =Supersaturated solution

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XIf 130g of NaNO3

are added to 100 gof water, how manygrams will NOTdissolve?

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XIf 130g of NaNO3

are added to 100 gof water at 30 degrees, how manygrams will NOTdissolve?

92 grams will dissolve130-92 = 38 g won’t

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