At the point K we have the highest temperature at which carnallite can exist with magnesium chloride in contact with solution.
What weight of carnallite is necessary in the preparation of 500 g. of magnesium?
Fig. 113 is a diagrammatic sketch of the model for carnallite looked at sideways from above.
In the first place it may be again noted that at a temperature above 167.5 (point M) carnallite cannot exist.
carnallite contains nearly a fourth of its weight of potassium chloride.
It is also formed as a by-product in the manufacture of potassium chloride from carnallite.
It is obtained as a by-product in the manufacture of potassium chloride from carnallite.
It is prepared from carnallite by saturating boiling water with the mineral and allowing the solution to cool.