A continually sampled capillary tube method has been used to obtain the self-diffusion coefficient of water in water and in 025, 0.5 and 1.0 M alkaline earth chloride solutions by using trace amounts of tritium. The trends with salt concentrations are almost linear and are examined by reference to viscosities, ion-hydration and ion sizes.

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20) Reference 18 shows that the first process is slow. The fraction of the enol isomer of 0-diketones is often measured by bromine titration; consequently, the isomerization must be slow.

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