At what temperature in degrees Celsius does a 25% sodium carbonate solution begin to crystallize?
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This tank contains a 25% sodium carbonate solution with a volume of 13 cubic meters; at what temperature in degrees Celsius will the sodium carbonate begin to crystallize or precipitate? Thank you, brothers, sisters, uncles, and aunts. The current temperature is 35 degrees Celsius. Is it okay not to start the stirring when the temperature is at 35 degrees Celsius? Will it crystallize?
You can take some out for experiments; a beaker will do, along with a glass rod and a water bath
At 35 degrees Celsius, sodium carbonate achieves its maximum solubility in water, making it the least likely to crystallize. At 35 degrees Celsius, the solubility of sodium carbonate in water is approximately 50 grams, with a saturated concentration of 33% ； Therefore, at this temperature, the sodium carbonate solution is the safest option in terms of crystallization, but complete avoidance of crystallization is not possible either; given the large size of the container, temperature differences will inevitably occur somewhere. The poorer the fluidity within the container, the more likely crystallization will take place, leading to blockages in the dead corners ； Therefore, it is best to use it when stirring conditions are available; if cost is a concern, use it intermittently. I used to work with a smaller tank and built a simple nitrogen stirring device myself; it worked very well. It was turned on every 4 hours for 3 minutes each time.
I remember learning it in the textbook, but now I can’t recall it at all without looking it up :( It’s okay though; I still need to browse the forum.:)