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Acidic character of liquid HF increases on addition of which of the following compound ? a. SiF4b. SF6c. BF3d. a and c both |
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Answer» The acidity of liquid HF can be increased by adding one of several inorganic fluorides that are Lewis acids and accept F– ion (for example, BF3 or SbF5). Correct answer is (d) a and c both Acidity of liquid HF will increased by adding Lewis acid fluorides- ex - BF3, SiF4, SbF5 etc. SiF4 + 2HF → H2[SiF6] \(\rightleftharpoons\) 2H+ + [SiFb]-2 BF3 + HF → HBF4 \(\rightleftharpoons\) H+ + BF4 |
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