This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1922 Excerpt: ... is lnteresting to note that in the oase of the synthetic sol of purity 34.479 a slight increase take s place in the conductance with time, while with the other sols a decrease occurs. The addition of HCl to a pure ferric oxide hydroaol evidently results in a reversal of the reaction by which oolloidal ferric oxide ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1922 Excerpt: ... is lnteresting to note that in the oase of the synthetic sol of purity 34.479 a slight increase take s place in the conductance with time, while with the other sols a decrease occurs. The addition of HCl to a pure ferric oxide hydroaol evidently results in a reversal of the reaction by which oolloidal ferric oxide Table 6. Conductivity of a series of "synthetic" ferric oxide hydrosols prepared by adding varying amounts of HCl to sol No. 6 (before dilution) so as to make the ferric oxide content of the resulting sols the same as for the other sols studied, viz., 0.4379 gram-equiv. per liter.. i SA c Purity Specific Specifio Specific coi-HaO HCl of the conduct-conduct-conduct i01u result-ivity ivity ivity ing sol after after after 12 hours 21 days 34 days K x I05 K x 10-5 K x 10-5 is formed cording to the equations Fe4"-" + 3 Ha0-Fe(0H)a + 3 H+ 2x Fe(0H)3 (Fea0a)x + 3x Ha0. In the case of the dilution of the eel with water the direct reaotion takes place. Addition of HCl reverses the reaction. The small amount of HCl added to form the sol of purity 34.479 was evidently insufficient to reverse the reaction and continual increase in conductivity occurred. With larger amounts of HCl the hydro lytic reaction is reversed. C0NDUCTANCE 0F FERRIC 0XIDE HYDRO S0L-SALT MIXTURES. Method and Data. The conductance of mixtures of ferric oxide hydrosol No. 5 with salts was determined, using six salts, KCl, Ba(N03)a, KaCr0, MgS0, K3Fe(CN)6 and NaP0. In these experiments the concentrations of the salts were varied from values much below the limiting concentration to those considerably above. The concentration of the sol was also varied from 1005 to 5$, using the diluted sols prepared several weeks before. The procedure cons...
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Add this copy of Conductivity Studies on Colloids 1 to cart. $26.53, new condition, Sold by Paperbackshop rated 4.0 out of 5 stars, ships from Bensenville, IL, UNITED STATES, published 2019 by HardPress Publishing.
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