2 HF + CuCO₃ → H₂O + CO₂ + CuF₂

This is an acid-base reaction (neutralization): HF is an acid, CuCO₃ is a base.

Reactants:

• HF – Fluorane
  • Other names: Hydrofluoric acid , Hydrogen fluoride , Fluorhydric acid ... show moreHydronium fluoride , Hydrofluoric acid (70% aqueous solution) , Hydrofluoric acid, anhydrous , Anhydrous hydrogen fluoride , Aqueous hydrogen fluoride , HF-A show less
  • Appearance: Colorless solution ; Colourless gas or colourless liquid (below 19.5 °C) ; Colourless gas or colourless fuming liquid with pungent odour ; Colourless fuming liquid with pungent odour ; Colorless gas or fuming liquid (below 67°F) with a strong, irritating odor. [Note: Shipped in cylinders.]
• CuCO₃

Products:

• H₂O – Water, oxidane
  • Other names: Water (H2O) , Hydrogen hydroxide (HH or HOH) , Hydrogen oxide ... show moreDihydrogen monoxide (DHMO) (systematic name) , Hydrogen monoxide , Dihydrogen oxide , Hydric acid , Hydrohydroxic acid , Hydroxic acid , Hydrol , Μ-oxido dihydrogen , Κ1-hydroxyl hydrogen(0) show less
  • Appearance: White crystalline solid, almost colorless liquid with a hint of blue, colorless gas
• CO₂
  • Names: Carbon dioxide , {{plainlist| , CO2 ... show moreCarbonic acid gas , Dry ice , [CO2] , Carbonic anhydride , R-744 , E-290 , E 290 , E290 , Carbonic acid anhydride , Carbon-12 dioxide , Methanedione , Carbon oxide , CO₂ , [Note: Normal constituent of air (about 300 ppm)]. show less
  • Appearance: Colorless gas ; Odourless colourless compressed liquefied gas ; Colorless, odorless gas. [Note: Shipped as a liquefied compressed gas. Solid form is utilized as dry ice.]
• CuF₂ – Copper difluoride
  • Other names: Copper(II) fluoride , Cupric fluoride; Copper fluoride; Copper (2+) Difluoride , Cupric fluoride
  • Appearance: White crystalline powder | When hydrated: Blue