Hydrofluoric Acid and Sodium Hydroxide

HF + NaOH → NaF + H2O

Visão geral

Hydrofluoric acid, despite being a weak acid (Ka = 6.8 × 10⁻⁴), reacts completely with sodium hydroxide to form sodium fluoride and water. HF is unusually dangerous among weak acids because it penetrates skin and causes deep tissue burns by binding calcium ions in bones. The high heat of neutralization reflects the strong H-F bond.

Participantes

Papel Substância Coeficiente Estado
Reagente Hydrofluoric Acid HF 1 (aq)
Reagente Sodium Hydroxide NaOH 1 (aq)
Produto Water H₂O 1 (l)

Exemplo do cotidiano

Sodium fluoride from this reaction is the form of fluoride added to municipal water supplies and toothpaste for dental protection.

Importância industrial

O HF é essencial na gravação de vidro, no fabrico de semicondutores, no refinamento de petróleo e na produção de PTFE (Teflon). O fluoreto de sódio é um importante agente de fluoretação da água potável para a prevenção de cáries.

Propriedades

Tipo
Acid-Base
Reversível
Não
Energia
Exotérmico
ΔH
-68,6 kJ/mol

Reações relacionadas

Hydrochloric Acid and Barium Hydroxide Acetic Acid and Sodium Acetate Buffer System Acetic Acid Dissociation in Water Ammonia and Hydrochloric Acid Ascorbic Acid and Sodium Hydroxide Barium Hydroxide and Ammonium Thiocyanate (Endothermic) Carbonic Acid and Sodium Hydroxide Aluminum Hydroxide as Amphoteric Acid with NaOH Aluminum Chloride and Chloride Ion (Lewis Acid-Base) Formic Acid and Sodium Hydroxide

Frequently Asked Questions

What is the equation for Hydrofluoric Acid and Sodium Hydroxide?
The balanced equation is: HF + NaOH → NaF + H₂O.
What type of reaction is Hydrofluoric Acid and Sodium Hydroxide?
Hydrofluoric Acid and Sodium Hydroxide is a acid-base reaction.
Is Hydrofluoric Acid and Sodium Hydroxide exothermic or endothermic?
Hydrofluoric Acid and Sodium Hydroxide is exothermic (releases energy). The enthalpy change (ΔH) is -68.6 kJ/mol.