The compound that gives a basic solution in HF is

Question

The compound that gives a basic solution in HF is (A) AsF 5 (B) PF 5 (C) BF 3 (D) BrF3

Tardigrade Admin · Accepted Answer

As F 5+2 HF leftharpoons[ AsF 6]-+[ H 2 F ]+ PF 5+2 HF leftharpoons[ PF 6]-+[ H 2 F ]+ BF 3+2 HF leftharpoons[ BF 4]-+[ H 2 F ]+ BrF 3+ HF leftharpoons[ BrF 2]++[ H 2 F 2] BrF 3 act as a base as it donate F- in HF

Q. The compound that gives a basic solution in $H F$ is

$A s F_{5}$

$P F_{5}$

$B F_{3}$

$B r F_{3}$

As $F_{5} + 2 H F ⇌ [A s F_{6}]^{-} + [H_{2} F]^{+}$

$P F_{5} + 2 H F ⇌ [P F_{6}]^{-} + [H_{2} F]^{+}$

$B F_{3} + 2 H F ⇌ [B F_{4}]^{-} + [H_{2} F]^{+}$

$B r F_{3} + H F ⇌ [B r F_{2}]^{+} + [H_{2} F_{2}]$

$B r F_{3}$ act as a base as it donate $F^{-}$ in $H F$

Q. The compound that gives a basic solution in HF is

AsF5​

PF5​

BF3​

BrF3​