Chemistry Reference
In-Depth Information
regions of various silicon species, i.e., Si, (am), and in the presence of
1M concentration of fluoride species.
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At a fluoride concentration of 1M, silicon
oxide is soluble below pH 7 (Fig. 2.3). At a lower concentration of F, is not
stable at low pH values as shown in Fig. 2.4. For example, when and
the stable region for is confined between pH near 2 and 3.75. The
reaction of silicon with fluoride in this region can be described by:
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