SiO2 + 4 HF SiF4 + 2 H2O

This is an acid-base reaction (neutralization): SiO2 is a base, HF is an acid.

Reactants:

  • SiO2
    • HFFluorane source: wikipedia, accessed: 2019-09-27source: wikipedia, accessed: 2019-09-27
      • Other names: Hydrogen fluoride source: wikipedia, accessed: 2019-09-27source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Hydrofluoric acid source: wikipedia, accessed: 2019-09-27source: NIOSH NPG, accessed: 2019-09-02, Fluorhydric acid source: wikipedia, accessed: 2019-09-27
      • Appearance: Colourless gas or colourless liquid (below 19.5 °C) source: wikipedia, accessed: 2019-09-27; Colorless solution source: wikipedia, accessed: 2019-09-27; Colourless gas or colourless fuming liquid with pungent odour source: ICSC, accessed: 2019-09-04; Colourless fuming liquid with pungent odour source: ICSC, accessed: 2019-09-04; Colorless gas or fuming liquid (below 67°F) with a strong, irritating odor. [Note: Shipped in cylinders.] source: NIOSH NPG, accessed: 2019-09-02

    Products:

    • SiF4Tetrafluorosilane source: wikipedia, accessed: 2019-09-28source: ICSC, accessed: 2019-09-04, Silicon tetrafluoride source: wikipedia, accessed: 2019-09-28source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04
      • Other names: Silicon fluoride source: wikipedia, accessed: 2019-09-28source: ICSC, accessed: 2019-09-04, Fluoro acid air source: wikipedia, accessed: 2019-09-28, Perfluorosilane source: ICSC, accessed: 2019-09-04
      • Appearance: Colourless gas, fumes in moist air source: wikipedia, accessed: 2019-09-28; Colourless gas with pungent odour source: ICSC, accessed: 2019-09-04
    • H2OWater, oxidane source: wikipedia, accessed: 2019-09-27
      • Other names: Water (H2O) source: wikipedia, accessed: 2019-09-27, Hydrogen hydroxide (HH or HOH) source: wikipedia, accessed: 2019-09-27, Hydrogen oxide source: wikipedia, accessed: 2019-09-27
      • Appearance: White crystalline solid, almost colorless liquid with a hint of blue, colorless gas source: wikipedia, accessed: 2019-09-27