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Studies of partial molar volumes of 18-crown-6 in water at 25 C

✍ Scribed by K.J. Patil; R.B. Pawar; G.S. Gokavi

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
335 KB
Volume
75
Category
Article
ISSN
0167-7322

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✦ Synopsis

Measurements are reported for the density of aqueous solutions of 18-crown-6 in the concentration range of 0.1 m to 4.5 m at 25 C. The data is used to obtain apparent and partial molar volumes of 18-crown-6. It is observed that the partial molar volume goes through a minimum at about 2.5 m concentration, The limiting partial molar volume obtained, indicate a large negative limiting excess volume. These results are compared with the similar data reported earlier in D20. It is sugessted that the hydrophobic hydration of the 18-crown-6 is important in dilute concentration range due to which a structure making effect similar to that of apolar solutes is observed. 0 1998 Elsevier Science B.V.

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