Randy Holmes-Farley
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Matter of fact the line from dose container to doser pump was the one that got disconnected. Which means the running doser pump sucked open air every time it ran. I wouldn’t expect that open air in my apex doser cabinet to have any more Co2 than ambient room air.
So my NaOH changed to sodium bicarbonate after sucking in air?
So yes, running air over a solution of sodium hydroxide will eventually convert it to mostly sodium bicarbonate and I'd expect precipitation.