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  2. Silicon dioxide - Wikipedia

    en.wikipedia.org/wiki/Silicon_dioxide

    As it does not contain any hydrogen, non-hydrated silica cannot directly act as a Brønsted–Lowry acid. While silicon dioxide is only poorly soluble in water at low or neutral pH (typically, 2 × 10 −4 M for quartz up to 10 −3 M for cryptocrystalline chalcedony), strong bases react with glass and easily dissolve it. Therefore, strong ...

  3. Sodium silicate - Wikipedia

    en.wikipedia.org/wiki/Sodium_silicate

    The fixing type was "a mixture of silica well saturated with potash water glass and a sodium silicate" used to stabilize inorganic water color pigments on cement work for outdoor signs and murals. [12] [13] [14] [15]

  4. Silicic acid - Wikipedia

    en.wikipedia.org/wiki/Silicic_acid

    [4] [5] [6] Dehydrating the latter yields a hard translucent form of silica with atomic-scale pores, called silica gel, which is widely used as water absorbent and drying agent. Silica dissolves very sparingly in water [citation needed] and is present in seawater at concentrations below 100 parts per million. In such dilute solutions, silica is ...

  5. Solubility table - Wikipedia

    en.wikipedia.org/wiki/Solubility_table

    The tables below provides information on the variation of solubility of different substances (mostly inorganic compounds) in water with temperature, at one atmosphere pressure. Units of solubility are given in grams of substance per 100 millilitres of water (g/100 ml), unless shown otherwise. The substances are listed in alphabetical order.

  6. Hydrated silica - Wikipedia

    en.wikipedia.org/wiki/Hydrated_silica

    Hydrated silica is a primary ingredient in modern toothpastes, serving as a high performance abrasive during cleaning. [1] Hydrated silica is a form of silicon dioxide, which has a variable amount of water in the formula. When dissolved in water, it is usually known as silicic acid.

  7. Silicate - Wikipedia

    en.wikipedia.org/wiki/Silicate

    When treated with calcium oxides and water, silicate minerals form Portland cement. Equilibria involving hydrolysis of silicate minerals are difficult to study. The chief challenge is the very low solubility of SiO 4 4-and its various protonated forms. Such equilibria are relevant to the processes occurring on geological time scales.

  8. Silica cycle - Wikipedia

    en.wikipedia.org/wiki/Silica_cycle

    In the deep ocean, another 26.2 Tmol Si Year −1 is dissolved before being deposited to the sediments as opal silica. [20] At the sediment water interface, over 90% of the silica is recycled and upwelled for use again in the photic zone. [20] Biogenic silica production in the photic zone is estimated to be 240 ± 40 Tmol si year −1. [36]

  9. Biogenic silica - Wikipedia

    en.wikipedia.org/wiki/Biogenic_silica

    Diatoms in both fresh and salt water extract dissolved silica from the water to use as a component of their cell walls. Likewise, some holoplanktonic protozoa , some sponges, and some plants (leaf phytoliths) use silicon as a structural material. Silicon is known to be required by chicks and rats for growth and skeletal development.