solubility-curves-lab-answers

solubility-curves-lab-answers - different substances Q -...

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Solubility curves Solubility curves
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Class data Class data Write down the data & answer questions on bottom of the sheet Mass Temp Mass Temp 3 0 30 10 35 15 40 20 45 87 25 50 93 69 28 76 40 83 52 60
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Solubility curve for KClO3 0 10 20 30 40 50 60 0 10 20 30 40 50 60 70 80 90 Temperature (*C) 10 g / 100 g
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Results of lab: solubility of KClO Results of lab: solubility of KClO 3 3 0 10 20 30 40 50 60 70 80 0 20 40 60 80 10 Temperature (oC) g solute per 100 g H2O Unsaturated S a t u r e d 3a i) 7 iii) unsaturated ii) 14 iii) 24 - 25 3b i) 30°C ii) 3°C iii) 48°C 4 i) saturated ii) unsaturated KNO 3 Supersaturated 4 i) 4 ii) 4iii)
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Saturation and solubility curves Saturation and solubility curves In this experiment we expressed concentration in units of g solute / g H 2 O Putting concentrations in g solute / g solution would be tedious and impractical See Fig 2 on pg. 316 Notice that there are solubility curves for many
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Unformatted text preview: different substances Q - Why do temperatures range from 0-100C A - Water is a liquid at these temperatures Solubility curves tell us how much solid will dissolve at a given temperature They also allow certain calculations Calculations using solubility curves Calculations using solubility curves Using fig 2 (pg. 316) 5. 100 g H 2 O is saturated with KClO 3 at 100C. How much KClO 3 will come out of solution if the temperature is decreased to 48C? How much would precipitate under the same circumstances if 350 g water were used 6. 57 g - 18 g = 39 g (57 g - 18 g) x 3.5 = 13 7 g (85 g - 21 g) x 1.5 = (64 g) x 1.5 = 96 g For more lessons, visit www.chalkbored.com...
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solubility-curves-lab-answers - different substances Q -...

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