HomeEsperimenti
Hydrogen properties
Chimica

Hydrogen properties

To demonstrate two principal properties of hydrogen.

Preparazione e analisi dei gas
hydrogen; gas tests; combustion

Cosa imparano gli studenti

La scienza alla base di questo esperimento

Hydrogen is a flammable gas with other interesting properties. It is highly explosive, but it is also lighter than air and diffuses rapidly because it is a small molecule.

Attrezzatura utilizzata

  • Iron stand — 5404.52
  • Universal clamp — 5416.20
  • Right angle clamp — 5401.16
  • Conical flask 150 ml — 1322.10
  • Rubber stopper, 2 holes — 5450.80
  • Dropping funnel — 1359.00
  • Right angle bent glass delivery tube — 1468.07
  • Connection for glass delivery tubes — 5449.43
  • Dropping pipette — 1441.50
  • Test tube — 1473.60
  • Spatola — 5460.34
  • Cork stopper to fit test tube (not a rubber stopper) — 5453.20
  • Parafilm — 1646.00
  • Matches

Sostanze chimiche e reagenti

  • Hydrochloric acid 2 M — R:34-37 S:26-45
  • Granulated zinc
  • Acqua distillata

Note sulla sicurezza

  • Hydrogen is a very flammable gas and forms explosive mixtures with air. Remove any naked flame to a safe distance — preferably have no flames on the same bench as the apparatus.

Domande per gli studenti

  • Record your observation of what happens on igniting the gas.
  • Record what happens keeping the test tube vertical. What can you say about the weight of hydrogen with respect to air?
  • Record what happens, and explain it.

Cosa aspettarsi

<p>The combustion of the hydrogen causes the production of water in a very exothermic reaction. 2H2 + O2 → 2H2O + heat.</p><p>The water vapour formed condenses on the walls of the test tube.</p><p>There is no explosion and no burning gas.</p><p>Hydrogen is lighter than air. Placing the test tube in a vertical position allows it to escape and the test tube is filled with air.</p><p>Because of the small mass of the hydrogen molecule, the gas diffuses very rapidly.</p>

Smaltimento

Add plenty of water to the conical flask and dispose of the liquid into the liquid wastes container. Dispose of the zinc residues in the solid wastes container.

Prova a fare questo esperimento in classe

Questo esperimento fa parte dell’ATP “ Mobile Lab ” — un laboratorio autonomo che trasforma una normale aula in un vero e proprio laboratorio scientifico, con oltre 200 esperimenti di fisica, chimica, biologia, robotica e ingegneria. “ Gali ”, il tutor basato sull’intelligenza artificiale integrato in ATP Connect, guida gli studenti in ogni fase e risponde alle loro domande direttamente al banco di lavoro.

Vedi il Mobile LabContatta il nostro team