Презентация Inert metals онлайн

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Слайды и текст к этой презентации:

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№3 слайд
General Properties They do
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.

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№5 слайд
Copper is also used in the
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 )

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OCCURRENCE In nature, it is
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
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.

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Compounds of Copper Copper
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).

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ZINC Zinc is the first member
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
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
Содержание слайда: CHEMICAL PROPERTIES

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Chromium is the first member
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
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
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
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.

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COMPOUNDS Chromium III Oxide,
Содержание слайда: COMPOUNDS 1)Chromium (III) Oxide, Cr2O3 Chromium (III) oxide is a green colored powder.

№23 слайд
Chromium VI Oxide, CrO
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
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.

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