Does potassium hydroxide absorb carbon dioxide?
回答 (5)
2007-10-17 4:00 pm
✔ 最佳答案
Potassium hydroxide absorbs rapidly carbon dioxide and water from air. http://chemicalland21.com/industrialchem/inorganic/KOH.htm
Readily absorbs water and carbon dioxide from the air.
http://physchem.ox.ac.uk/MSDS/PO/potassium_hydroxide.html
參考: Google..............
2007-10-17 1:39 pm
very definetly.
Carbon dioxide forms a weak acid when it dissolves in water, carbonic acid:
CO2 + H2O -> H2CO3
This then combines with potassium hydroxide in an acid/base reaction:
H2CO3 + KOH -> KHCO3 + H2O
The result is potassium bicarbonate and water. When a solution of KOH is used in titrations, it must be titrated itself to determine its exact concentration. This is because it is constantly absorbing CO2 and loosing its strength as a base.
Carbon dioxide forms a weak acid when it dissolves in water, carbonic acid:
CO2 + H2O -> H2CO3
This then combines with potassium hydroxide in an acid/base reaction:
H2CO3 + KOH -> KHCO3 + H2O
The result is potassium bicarbonate and water. When a solution of KOH is used in titrations, it must be titrated itself to determine its exact concentration. This is because it is constantly absorbing CO2 and loosing its strength as a base.
參考: I'm a chemist!
2007-10-17 2:10 pm
carbon dioxide is a acidic oxide .KOH is a strong alkali.therefore there should be a acid base reaction causing dissolution of or absorbtion of carbon dioxide.
2007-10-17 1:39 pm
Yes. The Apollo spacecraft used cannisters filled with KOH to remove the carbon dioxide from the air.
KOH + CO2 --> KHCO3 + K2CO3 +H2O
KOH + CO2 --> KHCO3 + K2CO3 +H2O
2007-10-17 1:34 pm
yes
2KOH + CO2 = K2 CO3 + H2O
do the balancing urself
2KOH + CO2 = K2 CO3 + H2O
do the balancing urself
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