Reaction conditions for magnesium oxide and phosphate

Magnesium oxide is alkaline oxides, while phosphate is acid, and the response of the two is very natural;
But the produced product is different with excessive phosphate:
Mg (H2PO4) when excessive phosphate phosphate is phosphate.2. It should be soluble;
Mg3 (PO4) 2 is generated when there is insufficient phosphate, which should be insoluble; at this time, because the MGO itself is difficult to dissolve in the water, it will slowly react to mg (OH) 2 in the water.Dare to be sure if there will be a covering between the two difficult substances;
The product that may be generated is MGHPO4. It is estimated that it is like Cahpo4, and the water solution is small, so it is not easy to control.

Slowly add magnesium oxide to 80-90 degrees and the proportion of 1.6. The amount of component of the addition should be fully reacted before adding a little.In the hour, add acetate and ethyl acetate after cooling, and settle for 12-15 hours to filter the two aqueous compounds. The two aqueous compounds are heated at 100 degrees for a long time to get waterless.

Acetate ethyl is to facilitate precipitation. It can obtain a solution without adding it, but it may be small.

The temperature is 80-90, and the proportion of phosphate is about 1.6

The analysis upstairs is in place.What do you have to prepare?Do you want to bring crystal water?