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Solubility Curves. The amount of a solute that will dissolve is a solvent depends upon the temperature of the solution. The data to the right is how many grams of KNO 3 solid that will dissolve in 100ml of water at different temperatures. TemperatureMass 0 o C15g 10 o C23g - PowerPoint PPT Presentation
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Solubility CurvesSolubility Curves
The amount of a solute that The amount of a solute that will dissolve is a solvent will dissolve is a solvent
depends upon the depends upon the temperature of the solution.temperature of the solution.
KNOKNO33 dissolved in water dissolved in water
• The data to the The data to the right is how many right is how many grams of KNOgrams of KNO33 solid that will solid that will dissolve in 100ml dissolve in 100ml of water at of water at different different temperatures.temperatures.
TemperatureTemperatureMass Mass
00ooCC 15g15g
1010ooCC 23g23g
2020ooCC 34g34g
3030ooCC 47g47g
3838ooCC 60g60g
KNOKNO33 dissolved in water dissolved in water
This graphs shows the relationship between how much solid potassium nitrate will dissolve in water at different temperatures. Notice how it is not a straight line, but curves upward. The hotter the water, the more potassium nitrate will dissolve.
Question?Question?
How much PotassiumHow much Potassium
Nitrate will dissolve Nitrate will dissolve atat
25 degrees Celsius?25 degrees Celsius?
Follow the line upFollow the line up
from 25 degrees andfrom 25 degrees and
then over to the then over to the
mass.mass.
Solubility Curve of NHSolubility Curve of NH33
Notice how the Notice how the curve is different curve is different from the solid from the solid potassium nitrate. potassium nitrate. The reason is The reason is simple, ammonia simple, ammonia (NH(NH33) is a gas. ) is a gas. Therefore it is Therefore it is less less soluble in hot soluble in hot water.water.
Saturated SolutionSaturated Solution
Any point on the line Any point on the line
indicates a indicates a saturatedsaturated
solution. Saturatedsolution. Saturated
means the solventmeans the solvent
has dissolved as has dissolved as
much solute as much solute as
possible. possible.
Unsaturated SolutionUnsaturated Solution
• The The red red area ofarea of
the graph the graph
represents an represents an
unsaturated unsaturated
solution. Less solution. Less
solute is dissolvedsolute is dissolved
than a saturated than a saturated
solution.solution.
Supersaturated SolutionSupersaturated Solution
• The The red red area ofarea of
the graph the graph
represents a represents a
supersaturated supersaturated
solution. More solution. More
solute is dissolvedsolute is dissolved
than a saturated than a saturated
solution.solution.
Use this graph to help you Use this graph to help you answer the rest of the answer the rest of the
questions.questions.
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