Separating TeO2 from SiO2 - Chemistry Tips

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To separate TeO2 from SiO2, bromoform can be used due to its specific gravity of 2.88, allowing silica to float while TeO2 sinks. TeO2 has a specific gravity of 5.9, significantly higher than that of alpha quartz, which is 2.648. Additionally, hydrochloric acid (HCl) can dissolve TeO2 without affecting SiO2. For those interested in producing TeCl4, HCl is a viable option. This separation method highlights the differing solubility and density properties of the two compounds.
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How we can separate TeO2 from SiO2 ? :redface: :frown:
 
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The specific gravity of TeO2 is 5.9. Alpha quartz is the densest form of silica and has a SG of 2.648.

Try using bromoform (SG 2.88). Silica will float and TeO2 will sink.
 
chemisttree said:
The specific gravity of TeO2 is 5.9. Alpha quartz is the densest form of silica and has a SG of 2.648.

Try using bromoform (SG 2.88). Silica will float and TeO2 will sink.

what about using HCl

TeO2 dissolves in HCl

but SiO2 not

?:frown: :redface: :frown:
 
If you want to make TeCl4, try HCL.
 

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