8.4. Transition elements
A subsection of Chemistry, 0620, through 8. The Periodic Table
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Iron is a typical transition element. Iron: ● ● acts as a catalyst ● ● forms coloured compounds ● ● has more than one oxidation state. Name one major industrial process that uses iron as a catalyst and name the product made in this process. process product made  When aqueous sodiumhydroxide is added to aqueous iron(sulfate, a precipitate forms. What colour is this precipitate? Write the ionic equation for this reaction. Include state symbols. Iron(sulfate can be converted to iron(sulfate by potassiummanganate(at room temperature. What is the role of potassiummanganate(in this reaction? What condition must be used for this reaction to occur? In terms of electron transfer, what happens to the iron(ions in this reaction? State the colour change seen during this reaction. from purple to Deduce the charge on the iron ion in each of these compounds. FeF3 Fe(NO3)3  
0620_m20_qp_42
THEORY
2020
Paper 4, Variant 2
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Iron is a shiny metallic solid. Iron is a transition element. State three other physical properties of a transition element. Iron reacts with sulfuric acid. Fe + H2SO4 → FeSO4 + H2 Write a word equation for this reaction. Describe, with the aid of a diagram, how you could measure the speed of this reaction. In your answer describe: ● the apparatus you would use ● the measurements you would take. When iron reacts with sulfur, energy is released. What is the name given to a reaction which releases energy? The compound formed in this reaction is iron(sulfi de. What do you understand by the term compound ? The diagram below shows the structure of iron(sulfi de. Fe atoms S atoms What is the simplest formula for iron(sulfi de?
0620_s12_qp_22
THEORY
2012
Paper 2, Variant 2
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Iron is a shiny metallic solid. Iron is a transition element. State three other physical properties of a transition element. Iron reacts with sulfuric acid. Fe + H2SO4 → FeSO4 + H2 Write a word equation for this reaction. Describe, with the aid of a diagram, how you could measure the speed of this reaction. In your answer describe: ● the apparatus you would use ● the measurements you would take. When iron reacts with sulfur, energy is released. What is the name given to a reaction which releases energy? The compound formed in this reaction is iron(sulfi de. What do you understand by the term compound ? The diagram below shows the structure of iron(sulfi de. Fe atoms S atoms What is the simplest formula for iron(sulfi de?
0620_s12_qp_23
THEORY
2012
Paper 2, Variant 3
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Questions Discovered
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