primarni standard

primarni standard

Stabilan materijal velike čistoće koji se koristi u titracijama i drugim kemijskim analizama za pripremu otopina točne poznate koncentracije ili za određivanje koncentracije tvari koje reagiraju s primarnim standardnim materijalom. Na primjer, NaCl je primarni standard koji se može koristiti za titracijsko određivanje koncentracije AgNP3 u otopini: NaCl(aq) + AgNO3(aq) = AgCl(s) + NaNO3(aq).

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primarni

Astronomy; Mars

(1) a sun with respect to its planets, or a planet with respect to its satellites; (2) the brighter member of a double star system.

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General; Miscellaneous

Ideja nečega ili ono što se koristi kao mera, norma, ili model u uporednom procenjivanju.

primarni natrijum fosfat

Chemistry; Inorganic chemistry

NaH 2 PO 4 White crystals that are slightly hygroscopic, soluble in water, insoluble in alcohol; used in baking powders and acid cleansers, and as a cattle-food supplement.

u odnosu na standard

Education; Teaching

Procena na osnovu poređenja sirovog rezultata iz datog zadatka, za razliku od poređenja sa datim kriterijem.

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Chemistry; General chemistry

A solid or liquid material that easily vaporizes. A material with a significant vapor pressure .

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Chemistry; General chemistry

A very hard, brittle, heat-resistant substance that is used to grind the edges or rough surfaces of an object. boron carbide, diamond, and corundum are abrasives.

diastereoizomer, diastereomer

Chemistry; General chemistry

Stereoisomers which are not mirror images of each other. Diastereomers are chemically similar but distinguishable; they have different melting points and boiling points and they ...

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Chemistry; General chemistry

A branch of chemistry concerned with the discovery, design, synthesis , and investigation of biologically active compounds and reactions that these compounds undergo in living ...

slab elektrolit

Chemistry; General chemistry

A weak electrolyte is a solute that incompletely dissociates into ions in solution. For example, acetic acid partially dissociates into acetate ions and hydrogen ions, so that ...

grafit

Chemistry; General chemistry

An amorphous form of carbon , made of carbon atoms bound hexagonally in sheets (like chickenwire).

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Sveta gora

Greek mountain and pilgrimage site, known as the birthplace of early Christian Orthodox monasticism, housing around 20 Eastern Orthodox monasteries. ...