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Phosphorus is objectionable because in similar circumstances it produces phosphoricanhydride and phosphoric acid.
2
This matter has been fully discussed in connection with the phosphoricanhydride determination.]
3
When distilled with phosphoricanhydride they yield nitriles.
4
From the weight of magnesium pyrophosphate (Mg_{2}P_{2}O_{7}) obtained, calculate the phosphoricanhydride (P_{2}O_{5}) in the sample of apatite.
5
Immediately it comes in contact with atmospheric moisture phosphoricanhydride is converted into phosphoric acid, but this also occurs at first as a solid substance.