Home > categories > Minerals & Metallurgy > Lime > Blow into the lime water, the lime water becomes clear from the clarification, and slowly become clear, why is this?

Question:

Blow into the lime water, the lime water becomes clear from the clarification, and slowly become clear, why is this?

Answer:

This is because you're blowing gas containing carbon dioxide, which can react with lime water to produce calcium carbonate precipitation, insoluble in water, so the lime water becomes turbid, if it continues to blow, excess carbon dioxide and water to the reaction of calcium carbonate, calcium bicarbonate, this substance can dissolve in water, so it becomes clear.

Continue blowing until calcium hydroxide Ca (OH) 2 reacted completely, and the carbon dioxide and calcium carbonate CaCO3 reaction, generating calcium Ca (HCO3) 2, the expression of CO2+H2O with molecular formula +CaCO3=Ca (HCO3) 2, Ca (HCO3) 2 soluble in water, so there is no precipitation dissolution, precipitation, solution and so slowly from cloudy to clear.

Inhaled oxygen, exhaled carbon dioxide, lime water is calcium hydroxide Ca (OH) 2 solution, through Straw to clarify lime water in air, carbon dioxide and calcium hydroxide Ca blowing (OH) 2 solution reaction, generating calcium carbonate and CaCO3 precipitation, this process with molecular formula was expressed as Ca (OH): 2+CO2=CaCO3 +H2O, CaCO3 of calcium carbonate is insoluble in water, so you will find the calcium hydroxide Ca (OH) 2 solution, which is limewater turbidity.