Can you help me with information about how to use CO2 heat energy in the Rankine cycle? As these rocks This will mean all the cloudiness in the lime water is caused by CO2. Hydrogen. Thus, this is an unreliable test for carbon dioxide, and it may lead you to misidentify the gas. | conclusion | discussion This article was co-authored by Meredith Juncker, PhD. ", "This really helped me in my assignments.Thanks wikiHow!". Decant the clear solution into a beaker: lime water. The lime water test can be used to test for CO2 … Unlock this expert answer by supporting wikiHow,,,,,,,,, Eseguire un Test per l'Anidride Carbonica, consider supporting our work with a contribution to wikiHow. Support wikiHow by Allow to settle. Add about 2 cm lime water to a test tube.