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With the completion of the first phase, de Lattre planned his next move. Realizing the difficulty of phase two, de Lattre divided French Union forces into three operational groups, which together would capture Hòa Bình by land, sea and air. Mobile Group 7, as part of Group North, would move southward along the Black River with a riverine unit ...
The direct reaction of hydrogen with fluorine and chlorine gives hydrogen fluoride and hydrogen chloride, respectively. Industrially these gases are, however, produced by treatment of halide salts with sulfuric acid.