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Golden rain demonstration is made by combining two colorless solutions, potassium iodide solution and Lead (II) nitrate solution at room temperature to form yellow precipitate. During the chemical reaction, golden particles gently drop from the top of Erlenmeyer flask to the bottom, similar to watching the rain through a window.
The Griess test is an analytical chemistry test which detects the presence of nitrite ion in solution. One of its most important uses is the determination of nitrite in drinking water. The Griess diazotization reaction, on which the Griess reagent relies, was first described in 1858 by Peter Griess. [ 1 ][ 2 ] The test has also been widely used ...
Sodium nitrate is the chemical compound with the formula Na N O 3. This alkali metal nitrate salt is also known as Chile saltpeter (large deposits of which were historically mined in Chile) [ 4 ][ 5 ] to distinguish it from ordinary saltpeter, potassium nitrate.
Sodium nitrite is an effective corrosion inhibitorand is used as an additive in industrial greases,[5]as an aqueous solution in closed loop cooling systems, and in a molten state as a heat transfer medium. [6] Food additive and preservative. [edit] Sodium nitrite is used to speed up the curingof meat,[7]inhibit the germination of Clostridium ...
Blue bottle reaction video. The blue bottle experiment is a color-changing redox chemical reaction. An aqueous solution containing glucose, sodium hydroxide, methylene blue is prepared in a closed bottle containing some air. Upon standing, it spontaneously turns from blue to colorless due to reduction of methylene blue by the alkaline glucose ...
Nitratine. Nitratine or nitratite, also known as cubic niter (UK: nitre), soda niter or Chile saltpeter (UK: Chile saltpetre), is a mineral, the naturally occurring form of sodium nitrate, NaNO 3. Chemically it is the sodium analogue of saltpeter. Nitratine crystallizes in the trigonal system, but rarely occurs as well-formed crystals.
Adams' catalyst is prepared from chloroplatinic acid H 2 PtCl 6 or ammonium chloroplatinate, (NH 4) 2 PtCl 6, by fusion with sodium nitrate. The first published preparation was reported by V. Voorhees and Roger Adams. [ 2 ] The procedure involves first preparing a platinum nitrate which is then heated to expel nitrogen oxides.
The reaction is accelerated by acid catalysts such as sulfuric acid and certain zeolites. These reactions often proceed via carbocation intermediates as shown for the dehydration of cyclohexanol. [5] Some alcohols are prone to dehydration. 3-Hydroxylcarbonyls, called aldols, release water upon standing at room temperature: