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“Alexandru cel Bun” School, Ia s i , Romania Burlacu Ionu t -Mihai Al-Mousa Kais VIII-th Grade

“Alexandru cel Bun” School, Ia s i , Romania Burlacu Ionu t -Mihai Al-Mousa Kais VIII-th Grade. Hydrogen. General data : • Chemical sy mbol : • Z=1 = > 1p + , 1e - (single proton, single electron), first element in the periodic table the atomic weight is : A = Z + n 0 = > n 0 =A-Z =

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“Alexandru cel Bun” School, Ia s i , Romania Burlacu Ionu t -Mihai Al-Mousa Kais VIII-th Grade

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  1. “Alexandru cel Bun” School, Iasi, RomaniaBurlacu Ionut-MihaiAl-Mousa KaisVIII-th Grade Hydrogen

  2. General data: •Chemical symbol : • Z=1 => 1p+, 1e-(single proton, single electron),first element in the periodic table the atomic weight is: A=Z+n0=>n0=A-Z= =1-1=0 Electronic configuration:

  3. •Isotopes of hydrogen: -light hydrogen (protium) {1p+, 1e-, 0n0 -heavy hydrogen (deuterium) {1p+, 1e-, 1n0 -very heavy hydrogen (tritium) {1p+, 1e-, 2n0

  4. Formation of the H2 molecule • MH2= 2AH = 2•1 = 2g/mol • 1 mol H2 = 6,023•1023 molecule H2 or Single covalent bonds

  5. b) Manufacture ways • Reactionbetween alkaline metalsand water. 2Na + 2H-OH => 2NaOH + H2↑ Sodium Water Sodium hydroxide Hydrogen

  6. b.Reaction between alkaline earth metals and water. Ca + 2H-OH => Ca(OH)2 + H2↑ Calcium Water Calcium hydroxide Hydrogen

  7. c. Reaction between activemetalsand acids Mg + 2HCl => MgCl2 + H2↑ Magnesium Chlorhydric acid Magnesium Hydrogen chloride d. Electronic decomposition 2 H2O ======>2 H2 + O2 Water Hydrogen Oxigen

  8. d) Physical properties of H2 • gas; • 14,45 lighter than air; • colourless, • odorless, • tasteless, • Diffuses through porous surfaces • insolublein water and soap solution.

  9. Cl2 e) Chemical properties of H2 * H2burnswith an explosion, but does not sustain burning. it is considered the fuel of the future as it does not pollute the air: H2 + O2 => H2O * H2– reaction with other non-metals S N2 C

  10. Reaction with Halogens: H2+ Cl2=>2HCl Hydrogen Chlorine Chlorhydric Acid Reaction with Sulphur: H2+ S =>H2S Hydrogen Sulphur Hydrogen sulphide

  11. 3H2+ N2=> 2NH3 Hydrogen Nitrogen Ammonia 2H2+ C =>CH4 Hydrogen Carbon Methane

  12. * Reaction withmetallic oxides: H2+ HgO =>H2O + Hg↓ Hydrogen Mercury oxide Water Mercury

  13. * Reaction with non-metallic oxides H2+ CO2=>H2O + C↓ Hydrogen Carbon dioxide Water carbon (black) 2H2+ SO2=> 2H2O + S↓ Hydrogen Sulphur dioxide Water Sulphur(yellow)

  14. Use: -laboratory synthesis; - Industrial synthesis; -hydrogenating organicsubstances; -obtaining metals; - cutting and welding metals; -fuel for the future.

  15. THE END Thank you for watching!

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