Оцените презентацию от 1 до 5 баллов!
Тип файла:
ppt / pptx (powerpoint)
Всего слайдов:
17 слайдов
Для класса:
1,2,3,4,5,6,7,8,9,10,11
Размер файла:
93.29 kB
Просмотров:
75
Скачиваний:
0
Автор:
неизвестен
Слайды и текст к этой презентации:
№1 слайд![General properties Transition](/documents_6/745487037f5e0a9f0c8abf88e3b82307/img0.jpg)
Содержание слайда: General properties
Transition Metals
The transition metals lie between groups 2A and 3A of the periodic table.
They are malleable and ductile
They are good conductors of heat and electricity
Transition metals are less reactive but melting and boiling points are higher than 1A and 2A group elements
№2 слайд![I R O N Its density is . g cm](/documents_6/745487037f5e0a9f0c8abf88e3b82307/img1.jpg)
Содержание слайда: I R O N
Its density is 7.87 g/cm3
Melting point is 1538 oC
Boiling point is 2861 oC
Pure iron is a silvery white colored, lustrous, soft metal with important magnetic properties. It is malleable and ductile.
№3 слайд![Occurrence of iron Iron is](/documents_6/745487037f5e0a9f0c8abf88e3b82307/img2.jpg)
Содержание слайда: Occurrence of iron
Iron is second most abundant metal (6%) in the earth’s crust. But it is not found in elemental form in nature.
Iron is found in most clays, sandstones and granites.
Hematite Fe2O3 Pyrite FeS2
Magnetite Fe3O4 Siderite FeCO3
are common ores of iron
№4 слайд![Preparation of Iron In the](/documents_6/745487037f5e0a9f0c8abf88e3b82307/img3.jpg)
Содержание слайда: Preparation of Iron
In the laboratory
1. H2 gas is added to iron oxide
Fe2O3 + 3H2 2Fe + 3H2O
2. Iron oxides are reduced by more active metals
3FeO + 2Al 3Fe + Al2O3
Fe2O3 + 2Al 2Fe + Al2O3
By the electrolysis of solutions of iron salts
FeCl2 Fe + Cl2
№5 слайд![Chemical Properties of Iron](/documents_6/745487037f5e0a9f0c8abf88e3b82307/img4.jpg)
Содержание слайда: Chemical Properties of Iron
Iron has 26Fe: [18Ar]4s23d6 electron configuration
In compounds, iron takes +2 and +3 0xidation states (charges)
№6 слайд![Reactions of Iron Iron reacts](/documents_6/745487037f5e0a9f0c8abf88e3b82307/img5.jpg)
Содержание слайда: Reactions of Iron
1) Iron reacts with dilute solutions of strong acids. Fe + 2HCl → FeCl2 + H2
Fe(s) + H2SO4(dil.) → FeSO4(aq) + H2(g)
The reactions of iron with oxidizing acids form its salts, containing Fe3+ ions
2Fe(s) + 6H2SO4(conc) → Fe2(SO4)3(aq) + 3SO2 + 6H2O
Fe(s) + 4HNO3(dil.) → Fe(NO3)3(aq) + NO(g) + 2H2O(l)
№7 слайд![Iron produces mixed oxides by](/documents_6/745487037f5e0a9f0c8abf88e3b82307/img6.jpg)
Содержание слайда: 2) Iron produces mixed oxides by water
2) Iron produces mixed oxides by water
3Fe + 4 H2O →Fe3O4 + 4H2
3) When iron is heated with sulfur iron sulfide, FeS forms
Fe(s) + S(s) t FeS(s)
№8 слайд![At high temperature, it](/documents_6/745487037f5e0a9f0c8abf88e3b82307/img7.jpg)
Содержание слайда: 4) At high temperature, it reacts with halogens.
4) At high temperature, it reacts with halogens.
2Fe(s) + 3Cl2(g) 1200°C 2FeCl3(s)
Moisture and oxygen cause the formation of crystal hydrate of iron (III) oxide (corrosion)
4 Fe + 3 O2 + nH2O → 2Fe2O3 . nH2O
red-brown
№9 слайд![Uses Iron is useful in our](/documents_6/745487037f5e0a9f0c8abf88e3b82307/img8.jpg)
Содержание слайда: Uses
Iron is useful in our society today because iron is virtually used in everything : building ( bridge , highway , rail road ,etc.), transportation (car , train , boats ,plane, etc.) , tools (knife , machines , etc.)
№10 слайд![IMPORTANT COMPOUNDS OF IRON](/documents_6/745487037f5e0a9f0c8abf88e3b82307/img9.jpg)
Содержание слайда: IMPORTANT COMPOUNDS OF IRON
Iron has +2 and +3 oxidation states in its compounds. Fe2+ ion is called ferrous and compounds that contain Fe2+ ion are called ferrous compounds,
Fe3+ ion is called ferric and Fe3+ compounds are called ferric compounds
№11 слайд![Iron II compounds Ferro](/documents_6/745487037f5e0a9f0c8abf88e3b82307/img10.jpg)
Содержание слайда: Iron (II) compounds (Ferro Compounds)
1. Iron (II) chloride, FeCl2
It is obtained by passing hydrogen chloride gas over heated iron. FeCl2 is a white colored crystal.
Fe (s) + 2HCl (g) → FeCl2 (s) + H2 (g)
№12 слайд![. Iron II oxide, FeO This](/documents_6/745487037f5e0a9f0c8abf88e3b82307/img11.jpg)
Содержание слайда: 2. Iron (II) oxide, FeO
This compound is produced by decomposition of iron (II) oxalate.
FeC2O4 (s) heat FeO (s) + CO (g) + CO2(g)
FeO is also unstable in air.
4FeO (s) + O2 (g) → 2Fe2O3 (s)
№13 слайд![Iron III Compounds Ferric](/documents_6/745487037f5e0a9f0c8abf88e3b82307/img12.jpg)
Содержание слайда: Iron (III) Compounds (Ferric Compounds)
1. Iron(III) chloride, FeCl3
When iron is reacted with chlorine gas, it produces iron(III) chloride.
2Fe(s) + 3Cl2(g) heat 2FeCl3(s)
№14 слайд![. Iron III hydroxide, Fe OH](/documents_6/745487037f5e0a9f0c8abf88e3b82307/img13.jpg)
Содержание слайда: 2. Iron (III) hydroxide, Fe(OH)3
It is obtained by the reaction of Fe3+ with a base or carbonates. It is similar to gelatin. Fe(OH)3 is a reddish-brown colored precipitate which shows amphoteric property.
Fe3+(aq) + 3KOH(aq) → Fe(OH)3(s) + 3K+(aq)
№15 слайд![. Iron III oxide, Fe O . Iron](/documents_6/745487037f5e0a9f0c8abf88e3b82307/img14.jpg)
Содержание слайда: 3. Iron (III) oxide, Fe2O3
3. Iron (III) oxide, Fe2O3
In nature Fe2O3 is found in hematite and limonite minerals. It can be obtained by several methods.
2FeCl3 + 3H2O heat Fe2O3 + 6HCl
4FeO + O2 → 2Fe2O3
2Fe(OH)3 → Fe2O3 + 3H2O
4Fe(OH)2 + O2 → 2Fe2O3 + 4H2O
The most common preparation method of Fe2O3 is the burning of pyrite, FeS2 mineral.
4FeS2 + 11O2 → 2Fe2O3 + 8SO2
№16 слайд![Iron II, III oxide, Fe O Iron](/documents_6/745487037f5e0a9f0c8abf88e3b82307/img15.jpg)
Содержание слайда: Iron(II, III) oxide, Fe3O4
Iron(II, III) oxide, Fe3O4
Fe3O4, mixed oxide, is obtained by passing heated steam over iron metal or heating Fe2O3
3Fe + 4H2O heat Fe3O4 + 4H2
6Fe2O3 heat 4Fe3O4 + O2
Fe3O4 is found in nature as black colored magnetite.
№17 слайд![Compounds of Iron Ferro](/documents_6/745487037f5e0a9f0c8abf88e3b82307/img16.jpg)
Содержание слайда: Compounds of Iron
Ferro Compounds; Iron(II) compounds
1.Iron (II) chloride, FeCl2
2.Iron (II) sulfate ; FeSO4 . 7H2O
3.Iron (II) oxide; FeO
Ferric Compounds; Iron (III) compounds
1.Iron (III) chloride; FeCl3
2.Iron (III) oxide; Fe2O3
3.Iron (III) hydroxide Fe(OH)3
Iron (II, III) oxide, Fe3O4