Which test was used to identify carbon dioxide gas?

Question

Which test was used to identify carbon dioxide gas?

Answer 1

You can use two methods.

First, it is the limewater test.

Second, you can test by using fire.

1st method: If the limewater turn chalky or cloundy, the gas is carbon dioxide. If not, it is other gas.

2nd method: Start a fire and pour some of the gas. If the fire burn out, the gas is carbon dioxide.

Carbon dioxide can turn limewater chalky and put out fire.  

Answer 2

Bubbling the gas into limewater is the classic test for CO2.

Limewater is a saturated solution of Ca(OH)2.  When CO2 is dissolved it reacts to produce insoluble CaCO3 and the solution turns cloudy.

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

Answer 3

The test for carbon dioxide is that it turns limewater cloudy/milky.

An Experiment: Get a glass and fill it with limewater then use a straw and blow into it. It shows that there is carbon dioxide in your breath as you breathe out. The limewater will turn cloudy after a couple of minutes.

Hope this helps.