Transition metals

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What is the meaning of that term 'Ligand'?
A ligand is a species which can donate a pair of electrons to a metal ion to form a co-oridnate bond
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What is the meaning of them term co-ordination number?
Number of atoms bonded to a metal ion.
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Why don't Cl- ions form octahedral shapes with metal ions?
Cl- ions are too big
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What are the uses of Ligands?
Pt complex forms cis-platin; [Ag(NH3)2]+ forms tallness reagent; Fe(II) forms haemoglobin
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What is the meaning of them term 'heterogenous catalyst'?
Catalyst in a different phase to reactants
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How can a catalyst be made more effective?
Increase S.A; Spread catalyst to an inert support medium
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How does poisoning reduce the effectiveness of catalysts?
Poison adsorbed onto active sites of catalyst; Poison is not desorbed; Can no longer bind to reactants
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What is the catalyst in the Haber process?
Iron
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Outline the reaction for the contact process.
.
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Which catalyst is used in the contact process?
Vanadium oxide
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What impurities are there in the Haber process?
Sulfur compounds
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Which catalyst is used in the manufacture of methanol?
Chromium oxide (Cr2O3)
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What is the meaning of the term 'Homogenous catalyst'?
A catalyst in the same phase as the reactants
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What is the meaning of them term autocatalysis?
A reaction in which the product formed acts as a catalyst
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How does Mn2+ act as a catalyst in the oxidation of ethanedioic acid?
Mn2+ is formed and reacts with MnO4- and then forms the intermediate M3+ which reacts with CzO4- and reforms Mn2+
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What is the meaning of them term co-ordination number?

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Number of atoms bonded to a metal ion.

Card 3

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Why don't Cl- ions form octahedral shapes with metal ions?

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Card 4

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What are the uses of Ligands?

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Card 5

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What is the meaning of them term 'heterogenous catalyst'?

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