CHEMISTRY GLOSSARY

Results 81–90 of 196 for razrijeđena otopina

isomorphism → izomorfija

Isomorphism is the existence of two or more substances that have the same crystal structure, so that they form solid solutions.

manganometry → manganometrija

Manganometry is a quantitative oxidimetric method based on measurement of potassium permanganate (KMnO₄) spent for an oxidation of the matter in question.

Micelle is an electrically charged colloidal particle, usually organic in nature, composed of aggregates of large molecules, e.g., in soaps and surfactants. For aqueous solutions, the hydrophilic end of the molecule is on the surface of the micelle, while the hydrophobic end (often a hydrocarbon chain) points toward the centre.

copper → bakar

Copper has been known since ancient times. The origin of the name comes from the Latin word cuprum meaning the island of Cyprus famed for its copper mines. It is malleable, ductile, reddish-brown metal. Resistant to air and water. Exposed surfaces form greenish carbonate film. Pure copper occurs rarely in nature. Usually found in sulfides as in chalcopyrite (CuFeS₂), coveline (CuS), chalcosine (Cu₂S) or oxides like cuprite (Cu₂O). Most often used as an electrical conductor. Also used in the manufacture of water pipes. Its alloys are used in jewellery and for coins.

Daniell cell → Daniellov članak

In 1836 the British chemist John Frederic Daniell (1790-1845) proposed an improved electric cell that supplied an even current during continuous operation. Daniell cell consisted of a glass jar containing copper and zinc electrodes, each immersed in their respective acidic sulphate solutions. The two solutions were separated by a porous clay cylinder separator. It was a galvanic cell in which the spontaneous electrodissolution of zinc and electroplating of copper provided the electrical current.

Zn(s)	→	Zn²⁺ + 2e^-	+0.763 V
Cu²⁺ + 2e^-	→	Cu(s)	+0.337 V
Zn(s) + Cu²⁺	→←	Zn²⁺ + Cu(s)	+1.100 V

→ Download high quality image

Millon’s reaction → Millonova reakcija

Millon’s reaction is used for testing proteins by the appearance of red colour which the proteins give by reacting with a solution of mercury in nitric acid.

mixture → smjesa

Mixture is a heterogeneous association of substances where various individual substances retain their identities and can usually be separated by mechanical means. Includes solutions or compounds but does not include alloys or amalgams.

molar absorption coefficient → molarni apsorpcijski koeficijent

Molar absorption coefficient (ε) is the absorption coefficient divided by amount-of-substance concentration of the absorbing material in the sample solution (ε = a/c). The SI unit is m²mol^-1. Also called extinction coefficient, but usually in units of dm³cm^-1mol^-1.

Nessler’s reagent → Nesslerov reagens

Nessler’s reagent is a solution of mercury(II) iodide (HgI₂) in potassium iodide and potassium hydroxide named after the German chemist Julius Nessler (1827-1905). It is used in testing for ammonia, with which it forms a brown coloration or precipitate.

dialysis → dijaliza

Dialysis is a method by which large molecules (such as starch or protein) and small molecules (such as glucose or amino acids) may be separated in a solution by selective diffusion through a semipermeable membrane. Through this kind of membrane dissolved particles pass and colloid dimension particles fall behind. For example, if a mixed solution of starch and glucose is placed in a closed container made of a semipermeable substance (such as cellophane), which is then immersed in a beaker of water, the smaller glucose molecules will pass trough the membrane into the water, while the starch molecules remain behind.

Citing this page:

Generalic, Eni. "Razrijeđena otopina." Croatian-English Chemistry Dictionary & Glossary. 29 June 2022. KTF-Split. {Date of access}. <https://glossary.periodni.com>.