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  2. Sodium dichromate - Wikipedia

    en.wikipedia.org/wiki/Sodium_dichromate

    Sodium dichromate is generated on a large scale from ores containing chromium(III) oxides. The ore is fused with a base, typically sodium carbonate, at around 1000 °C in the presence of air (source of oxygen): 2 Cr 2 O 3 + 4 Na 2 CO 3 + 3 O 2 → 4 Na 2 CrO 4 + 4 CO 2. This step solubilizes the chromium and allows it to be extracted into hot ...

  3. Chromium trioxide - Wikipedia

    en.wikipedia.org/wiki/Chromium_trioxide

    Chromium trioxide is generated by treating sodium dichromate with sulfuric acid: [6] H 2 SO 4 + Na 2 Cr 2 O 7 → 2 CrO 3 + Na 2 SO 4 + H 2 O. Approximately 100,000 tonnes are produced annually by this or similar routes. [7] The solid consists of chains of tetrahedrally coordinated chromium atoms that share vertices.

  4. Chromate and dichromate - Wikipedia

    en.wikipedia.org/wiki/Chromate_and_dichromate

    The chromate and dichromate ions are fairly strong oxidizing agents. Commonly three electrons are added to a chromium atom, reducing it to oxidation state +3. In acid solution the aquated Cr 3+ ion is produced. Cr 2 O 2− 7 + 14 H + + 6 e − → 2 Cr 3+ + 7 H 2 O ε 0 = 1.33 V. In alkaline solution chromium(III) hydroxide is produced.

  5. Standard Gibbs free energy of formation - Wikipedia

    en.wikipedia.org/wiki/Standard_Gibbs_free_energy...

    The standard Gibbs free energy of formation (G f °) of a compound is the change of Gibbs free energy that accompanies the formation of 1 mole of a substance in its standard state from its constituent elements in their standard states (the most stable form of the element at 1 bar of pressure and the specified temperature, usually 298.15 K or 25 °C).

  6. List of inorganic compounds - Wikipedia

    en.wikipedia.org/wiki/List_of_inorganic_compounds

    Sodium nitroprusside – Na 2 [Fe(CN) 5 NO]·2H 2 O; Sodium oxide – Na 2 O; Sodium perborate – NaBO 3 ·H 2 O; Sodium perbromate – NaBrO 4; Sodium percarbonate – 2Na 2 CO 3 ·3H 2 O 2; Sodium perchlorate – NaClO 4; Sodium periodate – NaIO 4; Sodium permanganate – NaMnO 4; Sodium peroxide – Na 2 O 2; Sodium peroxycarbonate – Na ...

  7. 1,4-Dioxane - Wikipedia

    en.wikipedia.org/wiki/1,4-Dioxane

    1,4-Dioxane is miscible in water, essentially nonvolatile when dissolved in water, not well adsorbed by activated carbon, not readily oxidized by common oxidants. Dioxane is used as a solvent for a variety of practical applications as well as in the laboratory, and also as a stabilizer for the transport of chlorinated hydrocarbons in aluminium ...

  8. Sodium oxalate - Wikipedia

    en.wikipedia.org/wiki/Sodium_oxalate

    Sodium oxalate starts to decompose above 290 °C into sodium carbonate and carbon monoxide: [2]. Na 2 C 2 O 4 → Na 2 CO 3 + CO. When heated at between 200 and 525°C with vanadium pentoxide in a 1:2 molar ratio, the above reaction is suppressed, yielding instead a sodium vanadium oxibronze with release of carbon dioxide [6]

  9. Chromium - Wikipedia

    en.wikipedia.org/wiki/Chromium

    The use of dichromate cleaning solutions is now phased out due to the high toxicity and environmental concerns. Modern cleaning solutions are highly effective and chromium free. [97] Potassium dichromate is a chemical reagent, used as a titrating agent. [98] Chromates are added to drilling muds to prevent corrosion of steel under wet conditions ...