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Sodium polysulfide is a general term for salts with the formula Na 2 S x, where x = 2 to 5. The species S x2−, called polysulfide anions, include disulfide (S 22− ), trisulfide (S 32− ), tetrasulfide (S 42− ), and pentasulfide (S 52− ). In principle, but not in practice, the chain lengths could be longer. [1] [2] The salts are dark ...
Disodium phosphate ( DSP ), or disodium hydrogen phosphate, or sodium phosphate dibasic, is an inorganic compound with the chemical formula Na 2 H P O 4. It is one of several sodium phosphates. The salt is known in anhydrous form as well as hydrates Na2HPO4·nH2O, where n is 2, 7, 8, and 12. All are water-soluble white powders.
V 2 O 5 + 6 NaOH → 2 Na 3 VO 4 + 3 H 2 O. The salt features tetrahedral VO 3− 4 anion centers linked to octahedral Na + cation sites. Condensation equilibria. Like many oxometalates, orthovanadate is subject to a number of reactions, which have been analyzed by 51 V NMR studies. At high pH, VO 3− 4 ions exist in equilibrium with HVO 2− 4.
Sodium persulfate is the inorganic compound with the formula Na 2 S 2 O 8. It is the sodium salt of peroxydisulfuric acid, H 2 S 2 O 8, an oxidizing agent. It is a white solid that dissolves in water. It is almost non- hygroscopic and has good shelf-life.
Sodium hyponitrite is a solid ionic compound with formula Na 2 N 2 O 2 or (Na +) 2 [ON=NO] 2−. There are cis and trans forms of the hyponitrite ion N 2 O 2− 2.The trans form is more common, but the cis form can be obtained too, and it is more reactive than the trans form.
Sodium dichromate is the inorganic compound with the formula Na 2 Cr 2 O 7. However, the salt is usually handled as its dihydrate Na 2 Cr 2 O 7 ·2 H 2 O. Virtually all chromium ore is processed via conversion to sodium dichromate and virtually all compounds and materials based on chromium are prepared from this salt. [1]
Sodium dihydrogen arsenate is the inorganic compound with the formula NaH 2 AsO 4. Related salts are also called sodium arsenate, including Na 2 HAsO 4 ( disodium hydrogen arsenate) and NaH 2 AsO 4 (sodium dihydrogen arsenate). Sodium dihydrogen arsenate is a colorless solid that is highly toxic. The salt is the conjugate base of arsenic acid :
2 NaHSO 4 → Na 2 S 2 O 7 + H 2 O. Temperatures above 460 °C further decompose the compound, producing sodium sulfate and sulfur trioxide: Na 2 S 2 O 7 → Na 2 SO 4 + SO 3 Applications. Sodium pyrosulfate was used in analytical chemistry. Samples are fused with sodium pyrosulfate to ensure complete dissolution before a quantitative analysis ...