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Borax is also easily converted to boric acid and other borates, which have many applications. 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
The solution of orthoboric acid and borax in 4:5 ratio is used as a fire retarding agent of wood by impregnation. [38] It is also used in the manufacturing of ramming mass, a fine silica-containing powder used for producing induction furnace linings and ceramics. Boric acid is added to borax for use as welding flux by blacksmiths. [39]
[13] [14] The compound was first prepared, from borax, by the Dutch chemist William Homberg in 1702, and he is often incorrectly said to be the discoverer of boric acid. [ 12 ] [ 35 ] [ 36 ] He marketed it for medical use under the brand name "Homberg's sedative salt" and it was claimed to have sedative , anodyne ( analgesic ), and ...
Borate concentration (giving buffering capacity) can vary from 10 mM to 100 mM. As BBS is used to emulate physiological conditions (as in animal or human body), the pH value is slightly alkaline, ranging from 8.0 to 9.0.
Substance Formula 0 °C 10 °C 20 °C 30 °C 40 °C 50 °C 60 °C 70 °C 80 °C 90 °C 100 °C Barium acetate: Ba(C 2 H 3 O 2) 2: 58.8: 62: 72: 75: 78.5: 77: 75
The most common sources of boron are tourmaline, borax, Na 2 B 4 O 5 (OH) 4 ·8H 2 O, and kernite, Na 2 B 4 O 5 (OH) 4 ·2H 2 O. [17] it is difficult to obtain pure boron. It can be made through the magnesium reduction of boron trioxide, B 2 O 3. This oxide is made by melting boric acid, B(OH) 3, which in turn is obtained from borax.