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level: Level 1 of Transitional elements

Questions and Answers List

level questions: Level 1 of Transitional elements

QuestionAnswer
What is CU2+ reallyCu = central metal ion H20 = LIGANDS join with central ion by coordinate bonds [Cu(H2O)6]
What is a complex metal ionsurrounded by ligands
What is a liganda molecule which donates pair of electrons to the central ion forming a cooridinate bond ( dative covalent)
what is a coordinate bonda shared pair of electrons between 2 atoms where both electrons come from the same atom
What is the coordination numberthe total number of coordinate bonds formed between the ligand and central metal ion
What types of ligand are theyMonodenate - forms 1 coordinate bond with the central metal ion (H20. NH3, Cl-) Bidentate- form 2 coordinate bonds ( C204- the two o2) Multidentate - 6 coordinate bonds
What shape is when it has 6 coordinate bondsoctrahedral 90 degrees
What shape is when they is 4 coordinate bondsTetrahedral 109.5 square planar 90
What is stereoisomerismsame structural formula but different arrangements of ions
types of stereoisomerism in transcis (same ligand on top/bottoms) trans ( Ligand on bottom and top like Z shape) Optical
What is an optical isomernon SUPERIMPOSABLE MIRROR IMAGES OF EACH OTHER
What is cis platin in medicne used forAnti cancer drug by stopping cell division
What is ligand substitution in copper complexes(CU(H20)6 2+ with excess amonia (4NH3) makes CuNH3(4)H202 +4H20 4 water ligands swap with ammonia ligands PALE BLUE TO PURPLE
(CU(H20)6 2+ with 4Cl- ( excess hydrochloric acid )All 6 water ligands are substituted for 4CL- colour change is pale blue to yellow
Chromium with excess ammonia[CR(H20)3+] + 6NH3 = [Cr(NH3)6]3+ + 6H20 ALL 6 water subs violet to purple
Ligand substitution in the haemoglobinHaemoglobin has coodinate bond with oxygen that deposts oxygen but co2 can easily bond as well so results in death
Precipitate reactions colour changes[Cu(H20)6]2+ + 2NH3 = [Cu(OH)2(H20)4] + 2NH4+ Cu2+ + 20H- = Cu(OH)2 pale blue to blue