How is selenate formed?
Sodium selenate is produced by oxidation of selenium, first with nitric acid, producing selenous acid. The selenous acid is neutralized to form sodium selenite. The sodium selenite is oxidized in a basic medium hydrogen peroxide to form a selenate, which is then spray-dried. Na2SeO3 + H2O2 → Na2SeO4 + H2O.
Is selenate a base?
Selenate is a divalent inorganic anion obtained by removal of both protons from selenic acid. It has a role as a human metabolite. It is a selenium oxoanion and a divalent inorganic anion. It is a conjugate base of a hydrogenselenate.
Is sodium selenate organic?
Approved supplemental selenium sources include sodium selenite and selenate (both inorganic forms) and selenomethionine (yeast-based organic form).
What is the formula for sodium selenate?
Na2SeO4
Sodium selenate/Formula
An inorganic sodium salt having selenate as the counterion. Sodium selenate is the inorganic compound with the formula Na2SeO4, not to be confused with sodium selenite.
Is Selenate soluble in water?
Environmental fate Acid and reducing conditions reduce inorganic selenites to elemental selenium, whereas alkaline and oxidizing conditions favour the formation of selenates. Selenites and selenates are usually soluble in water. Elemental selenium is insoluble in water and not rapidly reduced or oxidized in nature.
What charge does Selenate have?
+6
Selenate. Selenate is a polyanion made up of Se and oxygen. The Se ion has a charge of +6 and is bound to four oxygen ions, forming a polyanion with a net charge of (-2).
Is sodium selenate an ionic compound?
Sodium selenite is a chemical compound. Its chemical formula is Na2SeO3. It contains sodium and selenite ions.
Is sodium selenate an antioxidant?
Conclusion. Sodium selenate biofortification affected the content of dietary minerals, TPC, and total antioxidant capacity in the culinary herb microgreens studied. The Se content, TPC, and total antioxidant capacity increased at the highest Se dose for all herb species.
Is sodium selenate ionic?
What is the difference between sodium selenite and selenium?
Sodium selenite is made using lab-grade chemicals, and outside of the world of nutrition, it is commonly used to make colourless glass. Selenomethionine, however, is chemically identical with the selenium you find naturally in food and in the body.
Is Selenate aqueous?
Top: the individual peak shapes for all contributing species in the 1.5066 mol dm−3 aqueous solution of sodium selenate. The hydrated selenate ion (green line), the hydrated sodium ion (purple line) and the aqueous bulk (orange line).
Is Silver Selenate soluble?
Silver selenite
| Names | |
|---|---|
| Melting point | 530 °C (986 °F; 803 K) |
| Boiling point | decomposes above 550 °C (1,022 °F; 823 K) |
| Solubility in water | slightly soluble |
| Solubility | soluble in acids |
Is the sodium in selenium harmful to humans?
Sodium Selenate is the sodium salt of selenium. As a trace mineral that is toxic in high doses, selenium is a cofactor for glutathione peroxidase, an anti-oxidant enzyme that neutralizes hydrogen peroxide. Selenium may be chemoprotective for certain cancers, particularly prostate cancer.
What does calcium selenate do to the body?
Calcium selenate is a white powder. Naturally occurring or synthetic substances that inhibit or retard oxidation reactions. They counteract the damaging effects of oxidation in animal tissues. (See all compounds classified as Antioxidants .)
What causes selenium to be toxic to microalgae?
Factors affecting selenium uptake such as pH, hardness, sulfur and phosphate consequently affect toxicity. Selenate uptake increased in presence of calcium and magnesium. Selenate toxicity to microalgae was inversely proportional to sulfate and phosphate concentrations.
What can sodium selenate do for prostate cancer?
Selenium may be chemoprotective for certain cancers, particularly prostate cancer. High dietary supplementation with sodium selenate may inhibit the progression of hormone-refractory prostate cancer due, in part, to an antiangiogenesis effect. (NCI04) Sodium selenate appears as colorless rhombic crystals.