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Química Nova

Print version ISSN 0100-4042

Abstract

MOURA, Aline O. et al. Kinetic studies of trans-[Co(en)2Cl2]Cl aquation. Quím. Nova [online]. 2006, vol.29, n.2, pp. 385-387. ISSN 0100-4042.  http://dx.doi.org/10.1590/S0100-40422006000200034.

The trans-dichlorobis(ethylenediamine)cobalt(III) chloride was synthesized in an undergraduate laboratory and its aquation reaction was carried out at different temperatures. This reaction follows pseudo-first-order kinetics and the rate constants, determined at 25, 35, 45, 55 and 70 º C, are 1.44 x 10-3; 5.14 x 10-3; 1.48 x 10-2; 4.21 x 10-2 and 2.21 x 10-1 s-1, respectively. The activation energy is 93.99 ± 2.88 kJ mol-1.

Keywords : Arrhenius equation; teaching experiment; activation energy.

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