Ferric Oxide Hydrosol
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B. Kruyt and J. Van de Speck 41 find that upon adding from 1. 55 to 2. 8 millimoles of sodium hydroxide to a ferric oxide hydrosol containing 0. 75 gm. Of ferric oxide and 0. 064 gm. Of chlorine per kilogram and allowing the mixture to stand for three hours, complete precipitation takes place and in some cases immediately. The sol is not precipitated when sodium hydroxide of the concentration of 3. 99 to 27. 9 millimoles is added, although it becomes turbid. When more than 30. 3 millimoles is a...dded, complete precipitation again ensues. They call this zone of no precipitation the "tolerance" zone of ferric oxid-e sol and con- sider the substance within that zone to consist of a negatively charged ferric oxide hydrosol.
In this laboratory, Powis's experiments were duplicated, using ferric chloride. Clear reddish brown solutions were ob- tained which were precipitated by the addition of sodium sul- fate. However, none of the sols prepared in the course of these experiments was stable. A gradual settling began after a couple of days and all the dispersed phase settled out within a week or two.
What to read after Ferric Oxide Hydrosol?
You can find similar books in the "Read Also" column, or choose other free books by Alexander Frieden to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
B. Kruyt and J. Van de Speck 41 find that upon adding from 1. 55 to 2. 8 millimoles of sodium hydroxide to a ferric oxide hydrosol containing 0. 75 gm. Of ferric oxide and 0. 064 gm. Of chlorine per kilogram and allowing the mixture to stand for three hours, complete precipitation takes place and in some cases immediately. The sol is not precipitated when sodium hydroxide of the concentration of 3. 99 to 27. 9 millimoles is added, although it becomes turbid. When more than 30. 3 millimoles is a...dded, complete precipitation again ensues. They call this zone of no precipitation the "tolerance" zone of ferric oxid-e sol and con- sider the substance within that zone to consist of a negatively charged ferric oxide hydrosol.
In this laboratory, Powis's experiments were duplicated, using ferric chloride. Clear reddish brown solutions were ob- tained which were precipitated by the addition of sodium sul- fate. However, none of the sols prepared in the course of these experiments was stable. A gradual settling began after a couple of days and all the dispersed phase settled out within a week or two.
What to read after Ferric Oxide Hydrosol?
You can find similar books in the "Read Also" column, or choose other free books by Alexander Frieden to read onlineMoreLess
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