Experiment 3 Advance Study Assignment: Resolution of Matter into Pure Substances
ID: 537036 • Letter: E
Question
Experiment 3 Advance Study Assignment: Resolution of Matter into Pure Substances, II. Fractional Crystallization Using Figure 1, determine a. the number of grams of KNO_3 that will dissolve in 100 g of H_2O at 100 degree C. ____ g KNO_3 b. the number of grams of water required to dissolve 25 g of KNO_3 at 100 degree C. ____ g H_2O c. the number of grams of water required to dissolve 2.0 g CuSO_4 + 5 H_2O at 100 degree C. ____ g H_2O d. the number of grams of water required at 100 degree C to dissolve a mixture containing 25 g KNO_3 and 2.0 g CuSO_4-5 H_2O ____ g H_2O To the solution in Problem 1d at 100 degree C, 10 g of water are added, and the solution is cooled to 0 degree C. a. How much KNO_3 remains in solution? ____ g KNO_3 b. How much KNO_3 crystallizes out? ____ g KNO_3 c. How much CuSO_4 middot 5 H_2O crystallizes out? ____ g CuSO_4 middot 5 H_2O d. What percent of the KNO_3 in the sample is recovered? ____ %Explanation / Answer
Following is the Solution to the first question (i.e. Question 1 ) of the given Question Set.
Solution:
Assuming that the X-axis, of the given plot, gives us information about g KNO3 (and CuSO4. 5 H2O ) dissolved in g H2O(i.e. Y - axis)... ...at 100 oC following will be the answers (obtained using the given plot ) ....
Part- (a) :
Answer: Almost 55 g KNO3 (approx.) will dissolve in 100g of H2O.
Part - (b) :
Answer: (...As shown in the given plot...) 40g H2O (approx.) would be required to dissolve 25g of KNO3 .....
Part - (c) :
Answer: 10g H2O (approx.) would be required to dissolve 2g CuSO4. 5 H2O... at 100 oC.
Part - (d):
Answer: Considering the given situation/condition stated in the problem (i.e. part-(d) ), (approx.) 40g H2O should be good enough for dissolving both 25g KNO3 and 2g of CuSO4. 5 H2O......
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