Coordination Compounds Flashcards
Coordination compounds find use in many qualitative and quantitative chemical analysis
Examples of such reagents include EDTA, DMG (dimethylglyoxime), α–nitroso–β–naphthol, coupon, etc.
Both are correct
Hardness of water is estimated by simple titration with…….
Na2EDTA
The Ca2+ and Mg2+ ions form stable complexes with EDTA.
The selective estimation of these ions can be done due to the difference in the stability constants of calcium and magnesium complexes.
Both are correct
Some important extraction processes of metals, like those of silver and gold, make use of complex formation. Gold, for example, combines with cyanide in the presence of……….. and ………… to form the coordination entity [Au(CN)2]– in aqueous solution. Gold can be separated in metallic form from this solution by the addition of………..
oxygen and water
zinc
Statement 1: Similarly, purification of metals can be achieved through formation and subsequent decomposition of their coordination compounds.
Statement 2: For example, impure nickel is converted to [Ni(CO)4], which is decomposed to yield pure nickel.
Both are true
……………… cyanocobalamin, the anti–pernicious anaemia factor, is a coordination compound of cobalt.
Vitamin B12
rhodium complex……………
a Wilkinson catalyst, is used for the hydrogenation of alkenes.
[(Ph3P)3RhCl]
Articles can be electroplated with silver and gold much more smoothly and evenly from solutions of the complexes…………………than from a solution of simple metal ions.
[Ag(CN)2]– and [Au(CN)2]–
In black and white photography, the developed film is fixed by washing with hypo solution which dissolves the undecomposed………….to form a complex ion…………….
AgBr
[Ag(S2O3)2]3–.
Statement 1: There is growing interest in the use of chelate therapy in medicinal chemistry.
Statement 2: excess of copper and iron are removed by the chelating ligands D–penicillamine and desferrioxamine B via the formation of coordination compounds
Both are correct
Statement 1: EDTA is used in the treatment of lead poisoning.
Statement 2: Some coordination compounds of platinum effectively inhibit the growth of tumours. Examples are cisplatin and related compounds.
Both are correct
