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A solution of nitric acid, water and alcohol, nital, is used for etching metals to reveal the microstructure. ISO 14104 is one of the standards detailing this well known procedure. [45] Nitric acid is used either in combination with hydrochloric acid or alone to clean glass cover slips and glass slides for high-end microscopy applications. [46]
The tetrahydrate, Th(NO 3) 4 •4H 2 O is formed by crystallizing from a stronger nitric acid solution. Concentrations of nitric acid from 4 to 59% result in the tetrahydrate forming. [ 2 ] The thorium atom has 12-coordination, with four bidentate nitrate groups and four water molecules attached to each thorium atom.
The Ostwald process begins with burning ammonia.Ammonia burns in oxygen at temperature about 900 °C (1,650 °F) and pressure up to 8 standard atmospheres (810 kPa) [4] in the presence of a catalyst such as platinum gauze, alloyed with 10% rhodium to increase its strength and nitric oxide yield, platinum metal on fused silica wool, copper or nickel to form nitric oxide (nitrogen(II) oxide) and ...
Dinitrogen pentoxide reacts with water to produce nitric acid HNO 3. Thus, dinitrogen pentoxide is the anhydride of nitric acid: [11] N 2 O 5 + H 2 O → 2 HNO 3. Solutions of dinitrogen pentoxide in nitric acid can be seen as nitric acid with more than 100% concentration.
Bromothymol blue is synthesized by addition of elemental bromine to thymol blue in a solution in glacial acetic acid. [6] To prepare a solution for use as pH indicator, dissolve 0.10 g in 8.0 cm 3 N/50 (a.k.a. 0.02 Normal) NaOH and dilute with water to 250 cm 3.
Molar concentration or molarity is most commonly expressed in units of moles of solute per litre of solution. [1] For use in broader applications, it is defined as amount of substance of solute per unit volume of solution, or per unit volume available to the species, represented by lowercase : [2]
Nital is a critical plot element in the Japanese manga series Dr. Stone, whose story revolves around the mysterious petrification of all mankind. Made from nitric acid that they produce from Bat Guano found in a cave, they produce nitric acid by using the Ostwald process (using Platinum as a catalyst and urine as an ingredient) and highly distilled alcohol with a ratio of 3:7.
Aqua regia first appeared in the De inventione veritatis ("On the Discovery of Truth") by pseudo-Geber (after c. 1300), who produced it by adding sal ammoniac (ammonium chloride) to nitric acid. [6] [d] The preparation of aqua regia by directly mixing hydrochloric acid with nitric acid only became possible after the discovery in the late ...
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