4 Bidentate and multidentate ligands

 

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Oxford Textbook Pages : 360 - 361

CGP Revision Guide Pages : 112

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Show Specification Ref : 3.2.5.2

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Question 1 / 3

AQA Jan 2012 Paper 1 Q2 do not write outside the box a trends in physical properties occur across all periods in the periodic table this question is about trends in the period elements from lithium to nitrogen identify from the period elements lithium to nitrogen the element that has the largest atomic radius mark b i state the general trend in first ionisation energies for the period elements lithium to nitrogen mark b ii identify the element that deviates from this general trend from lithium to nitrogen and explain your answer element explanation marks extra space c identify the period element that has the following successive ionisation energies first second third fourth fifth sixth ionisation energy kj mol mark wmp jan chem d draw a cross on the diagram to show the melting point of nitrogen do not write outside the box melting point k lithium beryllium boron carbon nitrogen mark e explain in terms of structure and bonding why the melting point of carbon is high marks extra space turn over wmp jan chem
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Question 2 / 3

AQA Jan 2013 Paper 1 Q2 do not write outside the box a use your knowledge of electron configuration and ionisation energies to answer this question the following diagram shows the second ionisation energies of some period elements second ionisation energy kj mol mg al si a i draw an x on the diagram to show the second ionisation energy of sulfur mark a ii write the full electron configuration of the al ion mark a iii write an equation to show the process that occurs when the second ionisation energy of aluminium is measured mark a iv give one reason why the second ionisation energy of silicon is lower than the second ionisation energy of aluminium mark wmp jan chem do not write outside the box b predict the element in period that has the highest second ionisation energy give a reason for your answer element reason marks c the following table gives the successive ionisation energies of an element in period first second third fourth fifth sixth ionisation energy kj mol identify this element mark d explain why the ionisation energy of every element is endothermic mark extra space turn over wmp jan chem
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Question 3 / 3

AQA Jun 2010 Paper 5 Q4 do not write outside the box a transition elements form complex ions with a range of colours and shapes by considering its electron arrangement state how an element can be classified as a transition element mark b explain the meaning of the term complex ion marks c in terms of electrons explain why an aqueous solution of cobalt ii sulfate has a red colour marks d the ligand edta is shown below o o o o ch n ch ch ch h c n h c o o o o d i draw circles around the atoms of two different elements that link to a transition metal ion by a co ordinate bond when edta behaves as a ligand marks d ii write an equation for the reaction between edta and a co h o ion use the abbreviation edta in your equation mark wmp jun chem do not write outside the box d iii explain why the complex ion formed as a product of the reaction in part d ii is more stable than the co h o ion marks e the diagram below shows part of the structure of haemoglobin fe haemoglobin contains an iron ii ion bonded to five nitrogen atoms and one other ligand the fifth nitrogen atom and the additional ligand are not shown in this diagram e i in this diagram bonds between nitrogen and iron are shown as n fe and as n fe state the meaning of each of these symbols meaning of meaning of marks e ii state the function of haemoglobin in the blood mark e iii with reference to haemoglobin explain why carbon monoxide is toxic marks turn over wmp jun chem
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