If sodium alginate is to form a big lump, the concentration is basically above 0.5%, it can be dissolved by heating to 60℃ and stirring, and then the solution of calcium chloride is poured in (the concentration is not important, it is only cross-linked gel, and the mass ratio between the two is much worse, unless there is special demand). It is suggested to drop it in, so that a gel film will be formed on the surface first, and then all the calcium chloride will be poured in and soaked, and after a while, it will be gel all over.
Extended data:
Precautions:
The blades of the agitator must be submerged below the liquid level in order to prevent excessive blowing.
Slowly sprinkle solid sodium alginate on the upper part of the vortex so that each sodium alginate particle can be wetted.
Sodium alginate must be added before the solution gradually thickens and the vortex is destroyed.
The agitator should be placed off-center in order to generate a large amount of flow in the lower part of the vortex.
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