2007-09-24 06:22:58 · 4 answers · asked by Fee 2 in Science & Mathematics ➔ Chemistry
use physical properties:
you can't freeze carbon dioxide with ice. it hints the material is probably very low in molecular weight and non-polar. it also doesn't have any smell.
you can try to freeze it with liquid nitrogen, it will become dry ice. carbon dioxide under normal environment doesn't not change to liquid. once you warm up the solid, you should see gas only. or you can put the solid with isopropyl (or rubbing) alcohol, the temperature stays at -78 degree celcius.
2007-09-24 06:40:24 · answer #1 · answered by Carborane 6 · 0⤊ 0⤋
It will extinguish a flame. In lab, we often use a burning splint to test for H2 and CO2. H2 will combust, but CO2 will put the flame out immediately.
It is also slightly acidic when bubbled through water. A moist piece of litmus paper should be able to signal the presence of an acid generating gas (there are many of these).
2007-09-24 06:50:49 · answer #2 · answered by serf_tide 4 · 0⤊ 0⤋
Burn some magnesium in it. The Mg becomes MgO (proving there was O present) and you will see black specks of soot, proving that C was present.
2007-09-24 06:53:44 · answer #3 · answered by Gervald F 7 · 0⤊ 0⤋
it changes damp blue litmus paper PINK because CO2 dissolves in water to yield H2CO3, carbonic acid.
2007-09-24 06:34:15 · answer #4 · answered by 8 ball 4 · 0⤊ 1⤋