LiAlH4 + BF3 = LiF + AlF3 + B2H6

Balanced Chemical Equation – Solution

3LiAlH4 + 4BF3 → 3LiF + 3AlF3 + 2B2H6

The coefficients show the number of particles (atoms or molecules), and the indices show the number of atoms that make up the molecule. New substances are formed as a result of the rearrangement of the original atoms. As a result of a chemical reaction, atoms of chemical elements do not disappear anywhere and new ones do not appear, their number remains unchanged – this follows from the law of conservation of mass of substances.

Chemical Reaction Information

Lithium Aluminum Hydride + Boron Trifluoride = Lithium Fluoride + Aluminum Fluoride + Diborane(6)

Reaction Type

This is an oxidation-reduction (redox) reaction. BF3 is an oxidizing agent, LiAlH4 is a reducing agent.

  • 4 BIII + 24 e  4 B-III (reduction)
  • 12 H-I  24 e  12 HI (oxidation)

Substances that react are called starting materials or reactants. The substances that form as a result are called reaction products.


LiAlH4 – Lithium tetrahydridoaluminate(III), Lithium alumanuide

  • Other names: Lithium aluminium hydride, Lithium aluminum hydride.
  • Appearance: White crystals (pure samples) | grey powder (commercial material) | hygroscopic.


  • Names: Boron trifluoride, Boron fluoride.
  • Appearance: Colorless gas (anhydrous); Colourless compressed gas with pungent odour. forms white fumes in moist air; Colorless gas with a pungent, suffocating odor.


LiF – Lithium fluoride

  • Appearance: White powder or transparent crystals.


  • Names: Aluminium fluoride, Aluminium(III) fluoride.
  • Appearance: White, crystalline solid.

B2H6 – Diborane(6)

  • Other names: Diborane, Boron hydride, Boroethane.
  • Appearance: Colorless gas; Colourless compressed gas with characteristic odour.
Similar Examples of Equalizing a Chemical Reaction
LiAlH4 + BF3 = B2H6 + LiF + AlF3
LiAlH4 + BF3 = AlF3 + LiF + B2H6
LiAlH4 + BF3 = B2H6 + LiAlF4

Alexander Stephenson

Candidate of Chemical Sciences, editor-in-chief of Lecturer at several international online schools, member of the jury of chemistry competitions and author of scientific articles.

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