Reactions
On passing hydrogen fluoride gas (in excess) through the salt, ammonium fluoride absorbs the gas to form the addition compound ammonium bifluoride. The reaction occurring is:
- NH4F + HF → NH4HF2
It sublimes when heated—a property common among ammonium salts. In the sublimation, the salt decomposes to ammonia and hydrogen fluoride, and the two gases recombine to give ammonium fluoride, i.e. the reaction is reversible:
- F ↔ NH3 + HF
Read more about this topic: Ammonium Fluoride
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