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.
Reactants:
LiAlH4 – Lithium tetrahydridoaluminate(III), Lithium alumanuide
- Other names: Lithium aluminium hydride, Lithium aluminum hydride.
- Appearance: White crystals (pure samples) | grey powder (commercial material) | hygroscopic.
BF3
- 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.
Products:
LiF – Lithium fluoride
- Appearance: White powder or transparent crystals.
AlF3
- 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.
| LiAlH4 + BF3 = B2H6 + LiF + AlF3 |
| LiAlH4 + BF3 = AlF3 + LiF + B2H6 |
| LiAlH4 + BF3 = B2H6 + LiAlF4 |
