SiO2 + 2 NaOH → Na2SiO3 + H2O

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

Reactants:

  • SiO2
    • NaOH
      • Names: Sodium hydroxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Caustic soda source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Lye source: wikidata, accessed: 2019-09-02
      • Appearance: White, waxy, opaque crystals source: wikipedia, accessed: 2019-09-27; White hygroscopic solid in various forms source: ICSC, accessed: 2019-09-04; Colorless to white, odorless solid (flakes, beads, granular form). source: NIOSH NPG, accessed: 2019-09-02

    Products:

    • Na2SiO3
      • Names: Sodium metasilicate source: wikidata, accessed: 2019-09-02, Sodium metasilicate (anhydrous) source: ICSC, accessed: 2019-09-04, Sodium sesquisilicate source: wikidata, accessed: 2019-09-02
      • Appearance: Colourless-to-white hygroscopic solid in various forms source: ICSC, accessed: 2019-09-04
    • H2O – Water, 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