Comment on each of the following observations.
A1F3 is almost insoluble in anhydrous HF, but dissolves if KF is present. Passage of BF3 through the resulting solution causes A1F3 to reprecipitate.
The Raman spectra of germanium tetrachloride, a solution of gallium trichloride in concentrated hydrochloric acid, and fused gallium dichloride contain the following lines:
| Absorption / cm 1 | |||
GcCl4 | 134 | 172 | 396 | 453 |
GaCl3/HCl | 114 | 149 | 346 | 386 |
GaCl2 | 115 | 153 | 346 | 380 |
When T1I3, which is isomorphous with the alkali metal triiodides, is treated with aqueous NaOH, hydrated Tl2O3 is quantitatively precipitated.
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