What was the gas observed bubbling from Zinc, Aluminum, and Magnesium?? Suggest a way this could be tested experimentally.
Write the complete, balanced reaction of the metals with hydrochloric acid. What was oxidized, and what was reduced?
2007-12-22 11:51:47 · 2 answers · asked by I don't know 2 in Science & Mathematics ➔ Chemistry
highly reactive metals like Zn, Al and Mg displace hydrogen from hydrochloric acid forming corresponding metal-chlorides and releasing hydrogen gas.
Zn+2HCl=>ZnCl2+H2
Zn is oxidised and H is reduced
Mg+2HCl=>MgCl2+H2
Mg is oxidised and H is reduced
2Al+6HCl=>2AlCl3+3H2
Al is oxidised and H is reduced
2007-12-22 12:00:31 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Hydrogen. Collect the gas in an inverted test tube. Put a glowing wooden splinter to the mouth of the test tube. The sound of Whoop! indicates the explosive burning of hydrogen.
Zn + 2HCl ===> ZnCl2 + H2
Mg + 2HCl ===> MgCl2 + H2
2Al + 6HCl ===> 2AlCl3 + 3H2
Zn, Mg, and Al are oxidized. H+ of HCl is reduced.
2007-12-22 19:57:27 · answer #2 · answered by steve_geo1 7 · 1⤊ 0⤋