2 V2O5 + 5 Si + 5 CaO 4 V + 5 CaSiO3

This is an oxidation-reduction (redox) reaction:

4 VV + 20 e- 4 V0 (reduction)

5 Si0 - 20 e- 5 SiIV (oxidation)

V2O5 is an oxidizing agent, Si is a reducing agent.

Reactants:

  • V2O5Divanadium pentaoxide source: wikipedia, accessed: 2019-09-28source: wikidata, accessed: 2019-09-02
    • Other names: Vanadium(V) oxide source: wikipedia, accessed: 2019-09-28source: wikidata, accessed: 2019-09-02, Vanadium pentoxide source: wikipedia, accessed: 2019-09-28source: ICSC, accessed: 2019-09-04source: wikidata, accessed: 2019-09-02, Vanadic anhydride source: wikipedia, accessed: 2019-09-28source: ICSC, accessed: 2019-09-04
    • Appearance: Yellow solid source: wikipedia, accessed: 2019-09-28; Yellow-to-red crystalline powder or solid in various forms source: ICSC, accessed: 2019-09-04; Yellow-orange powder or dark-gray, odorless flakes dispersed in air. source: NIOSH NPG, accessed: 2019-09-02; Finely divided particulate dispersed in air. source: NIOSH NPG, accessed: 2019-09-02
  • Si
    • Names: Silicon source: wikidata, accessed: 2019-09-07source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Si source: wikidata, accessed: 2019-09-07, Element 14 source: wikidata, accessed: 2019-09-07
    • Appearance: Steel-grey crystals or black-to-brown amorphous powder source: ICSC, accessed: 2019-09-04; Black to gray, lustrous, needle-like crystals. [Note: The amorphous form is a dark-brown powder.] source: NIOSH NPG, accessed: 2019-09-02
  • CaOCalcium oxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02
    • Other names: Quicklime source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Burnt lime source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Unslaked lime source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: NIOSH NPG, accessed: 2019-09-02
    • Appearance: White to pale yellow/brown powder source: wikipedia, accessed: 2019-09-27; White hygroscopic crystalline powder source: ICSC, accessed: 2019-09-04; White or gray, odorless lumps or granular powder. source: NIOSH NPG, accessed: 2019-09-02

Products:

  • V
    • Names: Vanadium source: wikidata, accessed: 2019-09-07, V source: wikidata, accessed: 2019-09-07, Element 23 source: wikidata, accessed: 2019-09-07
  • CaSiO3Calcium silicate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: NIOSH NPG, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Dicalcium silicate source: wikipedia, accessed: 2019-09-27
    • Other names: Belite source: wikipedia, accessed: 2019-09-27, Silicic acid, calcium salt (non-fibrous, <1% crystalline silica) source: ICSC, accessed: 2019-09-04, Calcium hydrosilicate source: wikidata, accessed: 2019-09-02source: NIOSH NPG, accessed: 2019-09-02
    • Appearance: White crystals source: wikipedia, accessed: 2019-09-27; White powder source: ICSC, accessed: 2019-09-04; White or cream-colored, free-flowing powder. [Note: The commercial product is prepared from diatomaceous earth & lime.] source: NIOSH NPG, accessed: 2019-09-02