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Boric acid is a weak acid, with pK a (the pH at which buffering is strongest because the free acid and borate ion are in equal concentrations) of 9.24 in pure water at 25 °C. But apparent p K a is substantially lower in swimming pool or ocean waters because of interactions with various other molecules in solution.
4 Material Safety Data Sheet. ... Toggle the table of contents. Boric acid (data page) ... This page provides supplementary chemical data on boric acid. Thermodynamic ...
Tetraboric acid or pyroboric acid is a chemical compound with empirical formula H 2 B 4 O 7. [2] It is a colourless water-soluble solid formed by the dehydration or polymerization boric acid . Tetraboric acid is formally the parent acid of the tetraborate anion [B 4 O 7 ] 2− .
Boron phosphate is an inorganic compound with the chemical formula BPO 4. The simplest way of producing it is the reaction of phosphoric acid and boric acid . It is a white infusible solid that evaporates above 1450 °C.
Sassolite is a borate mineral, specifically the mineral form of boric acid. It is usually white to gray, and colourless in transmitted light. It can also take on a yellow colour from sulfur impurities, or brown from iron oxides. [2]
In the case of citric acid, the overlap is extensive and solutions of citric acid are buffered over the whole range of pH 2.5 to 7.5. Calculation of the pH with a polyprotic acid requires a speciation calculation to be performed. In the case of citric acid, this entails the solution of the two equations of mass balance:
Potassium fluoroborate is obtained by treating potassium carbonate with boric acid and hydrofluoric acid. B(OH) 3 + 4 HF → HBF 4 + 3 H 2 O 2 HBF 4 + K 2 CO 3 → 2 KBF 4 + H 2 CO 3. Fluoroborates of alkali metals and ammonium ions crystallize as water-soluble hydrates with the exception of potassium, rubidium, and cesium.
It can be prepared by reacting calcium metal with boric acid. The resulting precipitate is calcium borate. A hydrated form occurs naturally as the minerals colemanite, nobleite and priceite. [citation needed] One of its uses is as a binder in some grades of hexagonal boron nitride for hot pressing.