User:DejaHaynes/sandbox
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Phosphoric acid
Dissociation reaction: 3H+ + PO4-3 H2O↔ 2H+ + PO4-2 + H+
Dissociation constant K value: 6.9 × 10-8; this is the ionization constant of water where the mathematical product hydronium and hydroxide remains constant in water and dilute aqueous solutions at constant temperature.
Example reaction with a strong base: 3Ca(OH)2 + 2H3PO4 ↔ Ca3(PO4)2 + 6H2O
Example reaction with a weak: H3PO4 + NH3 ↔ 3(NH4)3PO4
Formula: H3PO4
Phase at room temperature: Solid
Conjugate base from the reaction: Dihydrogen phospate ion
Molar Mass: 98.00 g/mol
Density: 1.88 g/cm3
How is it made: It is produced from fluorapatite, known as phosphate rock, 3Ca3(PO4)2.CaF2.
Safety Hazards:
- Health Hazards: Burns on mouth and lips, sour acrid taste, severe gastrointestinal irritation, nausea, vomiting, bloody diarrhea, difficult swallowing, severe abdominal pains, thirst, acidemia, difficult breathing, convulsions, collapse, shock, death (all from the acidity of Phosphoric acid)
- Fire Hazards: Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated
Uses:
- fertilizers
- soaps and detergents
- inorganic phosphates
- pickling and rust-proofing of metals
- sugar refining
- gelatin manufacturing
- water treatment
- animal feeds
- in foods and carbonated beverages