NAME REPORT FOR EXPERIMENT 9 (eontinued) Relative Solubility of a Solute in Two
ID: 558343 • Letter: N
Question
NAME REPORT FOR EXPERIMENT 9 (eontinued) Relative Solubility of a Solute in Two Solvents I. (a) Which liquid is denser, decane or water? B. F. b)i What experimental evidence supports your answer? 2Color of iodine in water Color of iodine in decane 3. (a) In which of the two solvents used is iodine more soluble? (b) Cite experimental evidence for your anawer C. Miseibility of Liquids 1. Which liquid pairs tested are miscible? 2. How do you classify the liquid pair decane-H,O, miscible or immiscible? D. Rate of Dissolving Versus Partiele Size 1. Time required for fine salt crystals to dissolve 2Time required for conse salt crystals to dissolve 3. Since the amount of salt, the volume of water, and the temperature of the systems were identical in both test tubes, how do you explain the difference in time for dissolving the fine vs. the coarse salt erystals? E. Rate of Dissolving Versus Temperature 1. Under which condition, hot or cold, did the salt dissolve faster? 2. Since the amount of salt, the volume of water, and the texture of the salt crystals were identical in both best tubes, how do you explain the difference in time for dissolving at the hot vs. cold temperatures? -90- 72Explanation / Answer
B.
1. (a) Water (1 g/mL) is denser than decane (0.73 g/mL).
(b) When you mix water with decane, the aqueous layer (water) stays down and the organic layer (decane) floats on it, which clearly illustrates that water is denser than decane.
2. Color of iodine in water = brown to colorless
Color of iodine in decane = colorless to purple
3. (a) Iodine is more soluble in decane.
Reason: Iodine is non-polar, hence it's soluble in non-polar solvents like decane.
(b) Reference: Windholz, Martha; Budavari, Susan; Stroumtsos, Lorraine Y.; Fertig, Margaret Noether, eds. (1976). Merck Index of Chemicals and Drugs (9th ed.). J A Majors Company. ISBN 0-911910-26-3.
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