the number of grams of CuSO4, 5H2O that will dissolve in 100g of H2O at 100 Celcius.
The Number Of Grams Of Cuso4 5h2o That Will Dissolve In 100g Of H2o At 100 Celcius 1 (65.58 KiB) Viewed 62 times
The Number Of Grams Of Cuso4 5h2o That Will Dissolve In 100g Of H2o At 100 Celcius 2 (41.11 KiB) Viewed 62 times
The Number Of Grams Of Cuso4 5h2o That Will Dissolve In 100g Of H2o At 100 Celcius 3 (26.75 KiB) Viewed 62 times
Experiment 3 Advance Study Assignment: Resolution of Matter into Pure Substances, II. Fractional Crystallization 1. Using Figure 3.1, determine a. the number of grams of CuSO4.5H₂O that will dissolve in 100 g of H₂0 at 100°C. g CuSO4.5 H₂O b. the number of grams of water required to dissolve 3.9 g of CuSO4.5 H₂O at 100°C. [Hint: Your answer to Problem 1(a) gives you the needed conversion factor for (g CuSO4.5H₂O) to (g H₂O).] g H₂O C. the number of grams of water required to dissolve 37 g KNO3 at 100°C. g H₂0 d. the number of grams of water required to completely dissolve a mixture containing 37 g of KNO, and 3.9 g of CuSO4.5H₂O, assuming that the solubility of one substance is not affected by the pres- ence of another. (This is generally a surprisingly good assumption when the substances have no ions in common!) g H₂O (continued on following page)
22 22 Experiment 3 Resolution of Matter into Pure Substances, II. Fractional Crystallization 2. To the solution in Problem 1(d) at 100°C, an additional 12.0 g of water are added, and the solution is cooled to 0°C. a. How much KNO, remains in solution? g KNO, b. How much KNO, crystallizes out? c. How much CuSO4.5H₂O crystallizes out? d. What percent of the KNO, in the sample is recovered? g KNO, g CuSO4.5H₂O % .
240 200 160 KNO3 120 CuSO4 H₂O 80 40 10 20 30 40 50 60 70 80 90 100 Temperature in °C 3.1 The solubility of potassium nitrate (KNO,) and copper(II) sulfate pentahydrate (CuSO, 5H r both vary appreciably with temperature. While both solubilities increase with increasing temperat Solubility in g solute/100 g H₂O
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