Articles written in Journal of Chemical Sciences
Volume 91 Issue 3 June 1982 pp 279-287 Inorganic and Analytical
The influence of concentration, ageing and pH of the gel medium on the periodic precipitation of cobalt oxinate in agar gel is reported. The results are explained on the basis of Shinohara’s revised flocculation theory. The flocculation value (
Volume 92 Issue 3 June 1983 pp 239-247 Physical and Theoretical
The influence of temperature on periodic crystallisation of magnesium hydroxide in agar-agar gel has been studied. The increase in velocity constant with temperature is attributed to the increase in the diffusion constant with temperature. The activation energy for diffusion of aqueous ammonia is calculated from the temperature — velocity constant correlation. The solubility of Mg(OH)2 decreases with temperature. The decrease in the spacing coefficient and fiocculation value of Mg(OH)2 with temperature is also explained because of the increase in temperature. Matalon and Packter’s equation correlating the spacing coefficient and concentration of the inner electrolyte is suitably modified to satisfy the temperature dependence of the spacing coefficient.
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