Beryllium - презентация, доклад, проект скачать

Нажмите для полного просмотра!

Содержание ▲

Вы можете ознакомиться и скачать презентацию на тему Beryllium. Доклад-сообщение содержит 20 слайдов. Презентации для любого класса можно скачать бесплатно. Если материал и наш сайт презентаций Mypresentation Вам понравились – поделитесь им с друзьями с помощью социальных кнопок и добавьте в закладки в своем браузере.

Слайды и текст этой презентации

Слайд 1

Описание слайда:

Beryllium Lesbek Mariya Group: XK-51

Слайд 2

Описание слайда:

Lecture plan General characteristic of beryllium Occurrence Preparation of beryllium Physical properties of beryllium Chemical properties of beryllium Compounds Application

Слайд 3

Описание слайда:

Beryllium Beryllium was first discovered in 1794 by french chemists Nicholas Vauquelin.The name beryllium comes from the name of beryl mineral.

Слайд 4

Описание слайда:

Beryllium is located in the Periodic table in the second A group and the second period. Beryllium the first member of group 2A. Beryllium is a chemical element with symbol Be and atomic number 4. Beryllium is located in the Periodic table in the second A group and the second period. Beryllium the first member of group 2A. Beryllium is a chemical element with symbol Be and atomic number 4. It’s electron configuration is +4 Be 1s² 2s²

Слайд 5

Описание слайда:

Beryllium is a steel gray and hard metal that is brittle at room temperature and has a close-packed hexagonal crystal structure. Beryllium is a steel gray and hard metal that is brittle at room temperature and has a close-packed hexagonal crystal structure. It melts at 1258ºC, boils at 2970ºC and has a density of 1,848 g/cm³. It is has one stable isotop: 9Be

Слайд 6

Описание слайда:

Occurrence The Sun has a concentration of 0.1 parts per billion of beryllium. Beryllium has a concentration of 2 to 6 parts per million in the Earth's crust. Beryllium is found in over 100 minerals,but most are uncommon to rare. The more common beryllium containing minerals include: bertrandite (Be4Si2O7(OH)2) beryl (Al2 [Be3(Si6O18)] chrysoberyl (Al2BeO4) phenakite (Be2SiO4).

Слайд 7

Описание слайда:

Minerals of Beryllium

Слайд 8

Описание слайда:

Слайд 9

Описание слайда:

Preparation Friedrich Wöhler and Antoine Bussy independently isolated beryllium in 1828 by the chemical reaction of metallic potassium with beryllium chloride, as follows: BeCl2 + 2 K → 2 KCl + Be At the present time beryllium is obtained by reducing beryllium fluoride with magnesium: BeF+Mg → Be + MgF2

Слайд 10

Описание слайда:

Chemical properties The chemical properties of beryllium are very similar to aluminium. It has only +2 oxidation number in it’s compounds. Metallic beryllium is relatively little reactive at room temperature. In a compact form it doesn’t react with water.

Слайд 11

Описание слайда:

Beryllium reacts with diluted H2SO4 and HNO3 solutions. Beryllium reacts with diluted H2SO4 and HNO3 solutions. Be+ H2SO4 (dil) →BeSO4+H2↑ 3Be+ 8HNO3 (dil) → 3Be(NO3) 2 + 4H2O+2NO Beryllium also can be affected by concentrated H2SO4 and HNO3 Be+2H2SO4 (conc) →BeSO4+2H2O+SO2 Be +4HNO3 (conc) →Be(NO3) 2+2H2O+2NO2

Слайд 12

Описание слайда:

Beryllium reacts with nonmetals and several compounds at high temperature: Beryllium reacts with nonmetals and several compounds at high temperature: 2Be+O2 → 2BeO Be+N2 650º C →Be3N2 Beryllium forms binary compounds with many non-metals. Anhydrous halides are known for F, Cl,Br and I: Be+F2 → BeF2 Be+Cl2 → BeCl2 Be+Br2 → BeBr2 Be+I2 → BeJ2

Слайд 13

Описание слайда:

Since beryllium is an amphoteric metal it also reacts with strong bases and liberates H2 gas Since beryllium is an amphoteric metal it also reacts with strong bases and liberates H2 gas Be+NaOH → Na2BeO2+H2 ↑ Be +2NaOH+2H2O → Na2 [Be(OH) 4] +H2 ↑

Слайд 14

$Compounds Beryllium oxide Beryllium oxide, BeO, is a white refractory solid, which has the wurtzite crystal structure and a thermal conductivity as...$

Описание слайда:

Compounds Beryllium oxide Beryllium oxide, BeO, is a white refractory solid, which has the wurtzite crystal structure and a thermal conductivity as high as in some metals. BeO is amphoteric. BeO+ 2HCl (conc) → BeCl2+H2O BeO+ 2NaOH (conc) +H2O →Na2[Be(OH) 4]

Слайд 15

Описание слайда:

Beryllium hydroxide Beryllium hydroxide, Be(OH)2, is an amphoteric hydroxide, dissolving in both acids and alkalis. Industrially, it is produced as a by-product in the extraction of beryllium metal from the ores beryl and bertrandite. With alkalis it dissolves to form the tetrahydroxidoberyllate anion.With sodium hydroxide solution: 2NaOH(aq) + Be(OH)2(s) → Na2Be(OH)4(aq)

Слайд 16

Описание слайда:

With acids, beryllium salts are formed.[For example, with sulfuric acid, H2SO4, beryllium sulfate is formed: With acids, beryllium salts are formed.[For example, with sulfuric acid, H2SO4, beryllium sulfate is formed: Be(OH)2 + H2SO4 → BeSO4 + 2H2O Beryllium hydroxide dehydrates at 400 °C to form the soluble white powder, beryllium oxide: Be(OH)2 → BeO + H2O

Слайд 17

Описание слайда:

Beryllium sulphide Beryllium sulphide is a chemical compound with the formula BeS. It is a white crystalline substance. Beryllium sulphide is slowly hydrolyzed by cold water, in hot water the reaction proceeds quickly: BeS+H2O → Be(OH) 2+H2S Diluted acids decompose beryllium sulfide with the release of hydrogen sulfide: BeS+H2Cl (dil) →BeCl2 + H2S BeS+H2SO4 (dil) → BeSO4 +H2S

Слайд 18

Описание слайда:

Beryllium sulphide reacts with hot solutions of alkali and alkali metal carbonates: Beryllium sulphide reacts with hot solutions of alkali and alkali metal carbonates: BeS+4NaOH →Na2 [Be(OH) 4]+Na2S BeS +2Na2CO3+H2O →Na2 [Be(OH)6 ]+ Na2S+CO2 Halogens, with the exception of iodine (which does not react with beryllium sulphide) form halides in the interaction with BeS: BeS+Cl2 → BeCl2+S

Слайд 19

Описание слайда:

Application in roentgen technology in nuclear power as a retarder of netrons in laser technology for the manufacture of radiators in aerospace engineering in the manufacture of thermal screens as a refractory material