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Слайды и текст к этой презентации:
№1 слайд![](/documents_6/73b427a5bc12b80b8a7e49f5afbcad03/img0.jpg)
№2 слайд![](/documents_6/73b427a5bc12b80b8a7e49f5afbcad03/img1.jpg)
№3 слайд![General Properties They do](/documents_6/73b427a5bc12b80b8a7e49f5afbcad03/img2.jpg)
Содержание слайда: General Properties
They do not have a tendency to have an ionic structure so they are inert in chemical reactions.
They have very high density, so they are called heavy metals.
They are found in nature as pure metals.
№4 слайд![](/documents_6/73b427a5bc12b80b8a7e49f5afbcad03/img3.jpg)
№5 слайд![Copper is also used in the](/documents_6/73b427a5bc12b80b8a7e49f5afbcad03/img4.jpg)
Содержание слайда: Copper is also used in the production of alloys. Some important alloys are:
Copper is also used in the production of alloys. Some important alloys are:
brass (Cu, Zn),
bronze (Cu, Zn, Sn, or Al )
№6 слайд![OCCURRENCE In nature, it is](/documents_6/73b427a5bc12b80b8a7e49f5afbcad03/img5.jpg)
Содержание слайда: OCCURRENCE
In nature, it is found as compounds and in elemental form.
The most important copper minerals are chalcopyrite (copper pyrite) (Cu . FeS2), chalcocite (Cu2S), agurite (CuCO3–Cu(OH)2), cuprite (Cu2O) and malachite (CuCO3 .Cu(OH)2).
№7 слайд![Chemical properties Copper is](/documents_6/73b427a5bc12b80b8a7e49f5afbcad03/img6.jpg)
Содержание слайда: Chemical properties
Copper is a less active metal than hydrogen. That's why it doesn't react with water, HCl, diluted H2SO4 or other acids.
№8 слайд![](/documents_6/73b427a5bc12b80b8a7e49f5afbcad03/img7.jpg)
№9 слайд![Compounds of Copper Copper](/documents_6/73b427a5bc12b80b8a7e49f5afbcad03/img8.jpg)
Содержание слайда: Compounds of Copper
Copper has +1 and +2 charges in its compounds. Ions with +1 are called copper (I) or cuprous, and ions with +2 are called copper (II) or cupric.
The most important cuprous compounds are: copper (I) oxide (Cu2O), and copper (I) chloride (Cu2Cl2), and those of cupric compounds are copper (II) chloride (CuCl2), and copper (II) sulfate (CuSO4).
№10 слайд![](/documents_6/73b427a5bc12b80b8a7e49f5afbcad03/img9.jpg)
№11 слайд![ZINC Zinc is the first member](/documents_6/73b427a5bc12b80b8a7e49f5afbcad03/img10.jpg)
Содержание слайда: ZINC
Zinc is the first member of group 2B.
Zinc takes +2 oxidation state in its compounds.
Zinc is a bluish-white metal
The density of zinc is 7.14 g/cm3.
Melting point is 419.5°C and boiling point is 907°C
№12 слайд![OCCURRENCE Zinc is not found](/documents_6/73b427a5bc12b80b8a7e49f5afbcad03/img11.jpg)
Содержание слайда: OCCURRENCE
Zinc is not found in elemental form in nature.
It is found as compounds, such as zincblende
(ZnS), willemite (Zn2SiO4 . H2O), smithsonite
or calamine (ZnCO3), and franklinite
(ZnO .Fe2O3) in crustal rocks.
№13 слайд![CHEMICAL PROPERTIES](/documents_6/73b427a5bc12b80b8a7e49f5afbcad03/img12.jpg)
Содержание слайда: CHEMICAL PROPERTIES
№14 слайд![](/documents_6/73b427a5bc12b80b8a7e49f5afbcad03/img13.jpg)
№15 слайд![](/documents_6/73b427a5bc12b80b8a7e49f5afbcad03/img14.jpg)
№16 слайд![](/documents_6/73b427a5bc12b80b8a7e49f5afbcad03/img15.jpg)
№17 слайд![Chromium is the first member](/documents_6/73b427a5bc12b80b8a7e49f5afbcad03/img16.jpg)
Содержание слайда: Chromium is the first member of group 6B.
Chromium is the first member of group 6B.
Pure chromium is grey in color, hard and bright like silver. The melting point is 1907°C, the boiling point is 2671°C and its density is 7.19 g/cm3 at
room temperature.
№18 слайд![OCCURRENCE The percentage of](/documents_6/73b427a5bc12b80b8a7e49f5afbcad03/img17.jpg)
Содержание слайда: OCCURRENCE
The percentage of chromium is about 0.14% by mass in the earth’s crust.
The most important mineral of chromium is chromite (FeO . Cr2O3), which has a brownish-black color.
№19 слайд![CHEMICAL PROPERTIES The main](/documents_6/73b427a5bc12b80b8a7e49f5afbcad03/img18.jpg)
Содержание слайда: CHEMICAL PROPERTIES
The main oxidation states of chromium are +2, +3 and +6, but it may exist from +1 to +6 oxidation states.
Powdered chromium is more active. It may be reacted easily with NO3– and SO42– compounds, and with O2 gas.
№20 слайд![. Chromium metal reacts with](/documents_6/73b427a5bc12b80b8a7e49f5afbcad03/img19.jpg)
Содержание слайда: 1. Chromium metal reacts with halo-acids, such as HCl and HBr, slowly.
1. Chromium metal reacts with halo-acids, such as HCl and HBr, slowly.
№21 слайд![](/documents_6/73b427a5bc12b80b8a7e49f5afbcad03/img20.jpg)
№22 слайд![COMPOUNDS Chromium III Oxide,](/documents_6/73b427a5bc12b80b8a7e49f5afbcad03/img21.jpg)
Содержание слайда: COMPOUNDS
1)Chromium (III) Oxide, Cr2O3
Chromium (III) oxide is a green colored powder.
№23 слайд![Chromium VI Oxide, CrO](/documents_6/73b427a5bc12b80b8a7e49f5afbcad03/img22.jpg)
Содержание слайда: 2) Chromium (VI) Oxide, CrO3
Chromium (VI) oxide is a red colored solid that melts at 197°C. It is a powerful oxidizing agent
№24 слайд![. Chromates CrO and](/documents_6/73b427a5bc12b80b8a7e49f5afbcad03/img23.jpg)
Содержание слайда: 3. Chromates (CrO42–) and dichromates (Cr2O72– )
3. Chromates (CrO42–) and dichromates (Cr2O72– )
Chromates of alkali metals, magnesium and calcium are soluble in water. Soluble chromates have usually yellow color.