Answer:
The equation for the Lewis acid/Lewis base reaction between boron trifluoride and fluoride ion is shown in the drawing.
Explanation:
The fluoride ion is yielding a pair of electrons to the boron trifluoride to form the tetrafluoroborate compound, wich is a low reactive anion, where BF3 behaves like an acid because it accepts the electron pair of the fluoride ion since the electrons shared in the B-F bond are located in the region of space between the two atomic nuclei and, consequently, are more distant from the fluoride nucleus than in the solitary fluoride anion.
