Describe the test for carbon dioxide?

Answer 1

Let the CO2 evolved/supplied be passed into FRESHLY PREPARED LIMEWATER by bubbling. The solution turns chalky from colourless(before).
Care must be taken that the supply tube dips inside limewater.

Lime water can be used to test the presence of carbon dioxide because lime water reacts with carbon dioxide to produce a precipitate of calcium carbonate( gives chalky colour). It is used to show how Limewater + Carbon Dioxide Chalk(/Limestone) + Water :

Ca(OH)2(aq) + CO2(g) CaCO3(s) + H2O(l)

Lime water can be prepared by dissolving quick lime(CaO) in water.
BE cautious reaction is highly exothermic.

PRECAUTION:
If too much carbon dioxide comes into contact with the cloudy limewater, it will cause the calcium carbonate precipitate to redissolve to form soluble calcium hydrogencarbonate.

CaCO3(s) + CO2(g) + H2O(l) Ca(HCO3)2(aq)

Answer 2

The gas evolved from the reaction must be trapped using a pipette; bubble the gas through limewater CA(OH)2. If the limewater turns milky carbon dioxide is present.

Answer 3

You are a bit confused. Blanketing a fire with carbon dioxide kills the fire by asphyxiation....by displacing available Oxygen. There is no chemical reaction. What happens when you douse a fire with water. Does the water react with the combustibles within the fire? No, the water takes away the heat and drops the temperature below the ignition temperature.

Answer 4

Bubble the gas in a test-tube of limewater.If limewater turns milky, CO2 is present.

Answer 5

Bubble the CO2 intoa test-tube of limewater.

If limewater turns chalky, CO2 is present.

Answer 6

Put a life baby (choose species here) mammal in the container with suspected gas. When it dies, if said baby is blue then it was probably Carbon Dioxide.

Alternatively buy a carbon dioxide detector.

Answer 7

let the carbondioxide supplied be passed into fleshly prepared limewater by bubbling

Answer 8

som is definately right.. he's got the chemistry stuff