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π SIMILAR VOLUMES
A thorough investigation into the British Standard method for the determination of pyritic sulphur has shown that it is not suitable for all Australian coals, and that instead, the direct or non-simultaneous method should be adopted. Determinations of the iron which is not extractable with nitric ac
Equations are developed that permit the calculation of the mean ionic activity coefllcients of Hf, H+, SO,'-(~1') and of H +, HS04-(yl') from the measured practical activity coefficient of sulphuric acid, if cc (the fraction of total sulphate as SOP \*-) and KS (the second dissociation constant of
## Abstract In this paper an account is given of a tower on a chamber acid plant which has been designed and operated in order to produce 96% sulphuric acid. So far as the authors are aware, no such tower has been reported in the literature and it may well be that the one nowβdescribed is unique. I