FOOTNOTES:

[95] This will require two or three hours to thoroughly complete. It is best to powder the oxide first produced, and recalcine.

[96] No magnetic oxide was formed.

[97] For example:—

CaO + 2HCl = CaCl₂ + H₂O.

PbO + H₂SO₄ = PbSO₄ + H₂O.

MgO + 2HNO₃ = Mg(NO₃)₂ + H₂O.

Al₂O₃ + 6HCl = Al₂Cl₆ + 3H₂O.

Fe₂O₃ + 3H₂SO₄ = Fe₂(SO₄)₃ + 3H₂O.

[98] Fe₂O₃: 2FeO:: 0.2877: 0.2589.

[99] 100 c.c. contain 1 gram of sulphuric acid.

[100] 3SiF₄ + 4KCl + 2H₂O = 2K₂SiF₆ + SiO₂ + 4HCl.

CHAPTER XVI.