These days I am noticing that the mixture of NaOH (NH) (10-12M) and N2SiO3 (NS) solution gets solidify after 24 hours. The ratio of mixture of NS to NH is 2. To mention, the same solutions that we use before weren't getting solidified, but at sudden (now a days) its getting solidified. What could be the possible reason of this and what measures can be taken to prevent it.
I observed the same phenomenon too. This happens when the sodium hydroxide cannot be dissolved property or homogenously mixed into the sodium silicate solution because of the saturation in Na2O. If you used a sodium silicate with a different composition or just change the ratio NS/SH you will fix that issue.
Regards
Thank you Dr. Djobo for your valuable inputs. I will try your suggest methods. But it is very strange to observe, before I have conducted several experiments and it never happend. Anyway..I will try out your inputs and let you know the outcomes.
With best regards
DAS
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