A text-book of assaying

by C. Beringer; J. J. Beringer

[69] About 5 inches in diameter.

[70] 61: 60:: 59: 58.13.

The iron in the ore is, then, the same in amount as that in 58.13 c.c. of the ferric chloride solution; and since 100 c.c. of the latter contain 1 gram of iron, 58.13 c.c. of the same contains 0.5813 gram of iron; and, further, if 1 gram of ore carries this amount of iron, 100 grams of ore will obviously give 58.13 grams of iron.

[71] These compounds are Ni₂As and Co₂As.

[72] With large quantities of iron the ferric precipitate should be re-dissolved and re-precipitated. The filtrate must be added to the original filtrate.

[73]
4KCy + NiSO₄ = K₂NiCy₄ + K₂SO₄
2KCy + AgNO₃ = KAgCy₂ + KNO₃
∴ 2AgNO₃ = Ni

[74] Zn + H₂SO₄ = H₂ + ZnSO₄.

[75] These 104 c.c. are equivalent to 100 c.c. of dry air at 0° C. and 760 mm.

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