Table 15C.2 lonic radii, r/pm* Na* 102(6*), 116(8) K* 138(6), 151(8) F 128(2), 131(4) 181 (close packing) * This scale is based on a value 140 pm for the radius of the 0² ion. More values are given in the Resource section. * Coordination number.

Table 15C.2 lonic radii, r/pm* Na* 102(6), 116(8) K 138(6), 151(8) F 128(2), 131(4) 181 (close packing) * This scale is based on a value 140 pm for the radius of the 0² ion. More values are given in the Resource section. * Coordination number.

Appl Of Ms Excel In Analytical Chemistry

2nd Edition

ISBN:9781285686691

Author:Crouch

Publisher:Crouch

Chapter11: Dynamic Electrochemistry

Section: Chapter Questions

Problem 8P

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Question

Estimate the diffusion coefficients and the effective hydrodynamic radii of the alkali metal cations in water from their mobilities at 25 °C (refer to the Resource section for values of the mobilities). Estimate the approximate number of water molecules that are dragged along by the cations. Ionic radii are given Table 15C.2.

Table 15C.2 lonic radii, r/pm*
Na*
102(6*), 116(8)
K*
138(6), 151(8)
F
128(2), 131(4)
181 (close packing)
* This scale is based on a value 140 pm for the radius of the 0² ion. More values are
given in the Resource section.
* Coordination number.

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