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Universums vanligaste ämne.
Vätgas (H)
Vätgas
Nästan 75% av solen består av väte (H)
Alla andra stjärnor består också av väte (H)
Väte är det lättaste grundämnet vi känner till.
På jorden finns det i allt vatten (H2O) och andra
föreningar.
Vätgas
Vätgas + syre =
Vätgas
Vätgas
Kan framställas med
hjälp av elektricitet ur
vatten eller saltsyra (
HCl)
Vätgas ur saltsyra (HCl) (elektrolys)
Strömkub
Elektrolys
1. Tag på skyddsrock +
glasögon.
2. Ta fram U-rör, ställning,
kolelektroder, sladdar,
strömkub. Fyll röret med
saltsyra. (var försiktig)
3. Koppla in allt i ett dragskåp.
4. Sätt på strömkuben på
likström ca 10 – 12 volt. Vad
händer?
5. Sätt en folieplugg i (-)röret
(katod) och ett pH-papper i
(+)röret (anod).
6. Efter ett par minuter, håll en
tänd tändsticka intill (-) röret,
drag ur pluggen. Vad
Likström
Växelström
Frågor
Vilket kemiskt tecken
har väte?
Vilken kemisk formel
har saltsyra?
Vilka två grundämnen
ingår i saltsyra?
Varför skall du vara
försiktig med
saltsyran?
Vad händer om du
antänder en
blandning av vätgas
och syre (O2)?
Vilken symbol har
likström?
Vad heter det när man
”slår sönder” saltsyra
till fritt väte och klor?
Vilka fördelar har
vätgas som bränsle i
ex. bilar?

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Framställa vätgas

  • 2.
  • 3. Vätgas Nästan 75% av solen består av väte (H) Alla andra stjärnor består också av väte (H) Väte är det lättaste grundämnet vi känner till. På jorden finns det i allt vatten (H2O) och andra föreningar.
  • 6. Vätgas Kan framställas med hjälp av elektricitet ur vatten eller saltsyra ( HCl)
  • 7. Vätgas ur saltsyra (HCl) (elektrolys) Strömkub
  • 8. Elektrolys 1. Tag på skyddsrock + glasögon. 2. Ta fram U-rör, ställning, kolelektroder, sladdar, strömkub. Fyll röret med saltsyra. (var försiktig) 3. Koppla in allt i ett dragskåp. 4. Sätt på strömkuben på likström ca 10 – 12 volt. Vad händer? 5. Sätt en folieplugg i (-)röret (katod) och ett pH-papper i (+)röret (anod). 6. Efter ett par minuter, håll en tänd tändsticka intill (-) röret, drag ur pluggen. Vad Likström Växelström
  • 9. Frågor Vilket kemiskt tecken har väte? Vilken kemisk formel har saltsyra? Vilka två grundämnen ingår i saltsyra? Varför skall du vara försiktig med saltsyran? Vad händer om du antänder en blandning av vätgas och syre (O2)? Vilken symbol har likström? Vad heter det när man ”slår sönder” saltsyra till fritt väte och klor? Vilka fördelar har vätgas som bränsle i ex. bilar?