2 HClO4 (l) + Ca(OH)2 (s) → Ca(ClO4)2 (aq) + 2 H2O (l)

This is an acid-base reaction (neutralization): HClO4 is an acid, Ca(OH)2 is a base.

Reactants:

  • HClO4 – Chloric(VII) acid source: wikipedia, accessed: 2019-09-27
    • Other names: Perchloric acid source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Hyperchloric acid source: wikipedia, accessed: 2019-09-27, Perchloric acid (72% solution) source: ICSC, accessed: 2019-09-04, Hydronium perchlorate source: ICSC, accessed: 2019-09-04
    • Appearance: Colorless liquid source: wikipedia, accessed: 2019-09-27; Colourless liquid with pungent odour source: ICSC, accessed: 2019-09-04
  • Ca(OH)2 – Calcium hydroxide source: wikipedia, accessed: 2019-09-28source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02
    • Other names: {{ubl source: wikipedia, accessed: 2019-09-28, Slaked lime source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Calcium hydrate source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02
    • Appearance: White powder source: wikipedia, accessed: 2019-09-28; Colourless crystals or white powder source: ICSC, accessed: 2019-09-04; White, odorless powder. [Note: Readily absorbs CO2 from the air to form calcium carbonate.] source: NIOSH NPG, accessed: 2019-09-02

Products:

  • Ca(ClO4)2 – Calcium perchlorate source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02
    • Other names: Calcium perchlorate tetrahydrate source: wikipedia, accessed: 2019-09-27, Calcium diperchlorate source: wikipedia, accessed: 2019-09-27, Perchloric acid calcium salt (2:1) source: wikipedia, accessed: 2019-09-27, Hydrated source: wikipedia, accessed: 2019-09-27
    • Appearance: White to yellow crystalline solid source: wikipedia, accessed: 2019-09-27
  • 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