2 Na + H2WO4 → Na2WO4 + H2

This is an oxidation-reduction (redox) reaction:

2 Na0 - 2 e- → 2 NaI (oxidation)

2 HI + 2 e- → 2 H0 (reduction)

Na is a reducing agent, H2WO4 is an oxidizing agent.

Reactants:

  • Na
    • Names: Sodium source: wikidata, accessed: 2019-09-07source: ICSC, accessed: 2019-09-04, Na source: wikidata, accessed: 2019-09-07, Element 11 source: wikidata, accessed: 2019-09-07, Natrium source: wikidata, accessed: 2019-09-07source: ICSC, accessed: 2019-09-04
    • Appearance: Silvery solid in various forms source: ICSC, accessed: 2019-09-04
  • H2WO4 – Dihydroxy-dioxotungsten source: wikipedia, accessed: 2019-09-27
    • Other names: Tungstic acid source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Orthotungstic acid source: wikipedia, accessed: 2019-09-27, Dihydrogen wolframate source: wikidata, accessed: 2019-09-02
    • Appearance: Yellow powder source: wikipedia, accessed: 2019-09-27

Products:

  • Na2WO4 – Sodium tungstate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
    • Other names: Sodium tetraoxotungstate(VI) source: wikidata, accessed: 2019-09-02, Sodium tungsten oxide source: wikidata, accessed: 2019-09-02, Sodium tungstate(VI) source: wikidata, accessed: 2019-09-02
    • Appearance: White rhombohedral crystals source: wikipedia, accessed: 2019-09-27
  • H2
    • Names: Dihydrogen source: wikidata, accessed: 2019-09-07, Hydrogen source: ICSC, accessed: 2019-09-04source: wikidata, accessed: 2019-09-07, H2 source: wikidata, accessed: 2019-09-07
    • Appearance: Odourless colourless compressed gas source: ICSC, accessed: 2019-09-04