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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.
Its reaction with hydrochloric acid to form boric acid is: Na 2 B 4 O 7 ·10H 2 O + 2 HCl → 4 H 3 BO 3 + 2 NaCl + 5 H 2 O. Borax is sufficiently stable to find use as a primary standard for acid-base titrimetry. [17]: p.316 Molten borax dissolves many metal oxides to form glasses.
This page provides supplementary chemical data on boric acid. Thermodynamic properties. Phase behavior Triple point? K (? °C), ? Pa Critical point? K (? °C), ?
Tetrahydroxyborate is an inorganic anion with the chemical formula ... when boric acid is dissolved in pure (neutral) water, most of it will exist as ...
In animals, boric acid/borate salts are essentially completely absorbed following oral ingestion. Absorption occurs via inhalation, although quantitative data are unavailable. Limited data indicate that boric acid/salts are not absorbed through intact skin to any significant extent, although absorption occurs through skin that is severely abraded.
When orthoborate salts are dissolved in water, the anion converts mostly to boric acid B(OH) 3 and other hydrogen-containing borate anions, mainly tetrahydroxyborate [B(OH) 4] −. The reactions of orthoborate in solution are therefore mostly those of these compounds.
Fluoroboric acid is corrosive and attacks the skin. It is available commercially as a solution in water and other solvents such as diethyl ether. It is a strong acid with a weakly coordinating, non-oxidizing conjugate base. [2] It is structurally similar to perchloric acid, but lacks the hazards associated with oxidants.
Lithium metaborate dissolves acidic oxides Me x O y with x < y, such as SiO 2, Al 2 O 3, SO 3, P 2 O 5, TiO 2, Sb 2 O 3, V 2 O 5, WO 3, and Fe 2 O 3. Lithium tetraborate, on the other hand, dissolves basic oxides with x > y , such as CaO , MgO and other oxides of the alkali metals and alkaline earth metals .