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????If hot CO2 gas is passed through a solution of NaOH+H2O, is it possible to get Na2CO3? In which state will it be in? Answered

what would be the efficiency of the system if the gas has high velocity?




Best Answer 7 years ago

I don't think it needs to be hot, but there is absolutely no way of telling you the potential efficiency unless you give very specific figures - volume through-put, concentrations, pressures, even the size of the bubbles.

CO2 + NaOH → NaHCO3

NaHCO3 + NaOH → NaCO3 + H2O

you seem to have lost some Sodium somewhere ;)


NaHCO3 + NaOH → Na2CO3 + H2O


7 years ago

heat is bad for this as co2 dissolves better at lower temperatures, higher pressure also helps. for the best outcome you should use a saturated solution of NaOH, after some gas has passed the sollution you will notice a fine white powder which will be the decahydrate of Na2CO3. if you want to produce more than one time NaCO3 this way keep the solution and just add new NaOH and use it again.

well thanks for answering my question.
i wanted to know if it is possible to recycle the Na2CO3 formed & use it again in the form of NaOH solution so that i dont need to add more NaOH, also the Na2CO3 should not give me again CO2 & NaOH after recycling.
Na2CO3 should give me NaOH & something else other than CO2.
this process should be continuous with input of only CO2 gas & electricity or other form of energy (if required).

Been too long since I took chemistry -- but that seems a long way around the barn to create washing soda...