Kablenberg—Action of Metallic Magnesium, Etc. 305 
Table 6. 
'Solutions contain 1-10 gram equivalent per liter.) 
Solute.. 
2 min. 
4 min. 
6 min. 
11 min. 
16 min. 
28 min. 
33 min. 
36 min. 
46 min. 
H 2 SO 4 . 
3 2 cc 
8.0 cc 
12.0 cc 
21.0 cc 
28.0 cc 
37.6 cc 
40.4 cc 
41.8 cc 
45.61cc 
1 min. 
3 min. 
5 min. 
7 min. 
11 min. 
14 min. 
24 min. 
29 min. 
49 min. 
HC1. 
3.0 cc 
8.5 cc 
14.0 cc 
19.0 cc 
27 5 cc 
31.4 cc 
.39.4 cc 
43.5 cc 
48.8 cc 
V (Solutions contain 1- 
-100 gram equivalent per 
liter. 
5 min. 
10 min. 
17 min. 
20 min. 
80 min. 
40 min. 
1 hr. 
5 min. 
1 hr. 
20 min 
3hrs. 
37 min. 
H 2 SO 4 . 
0.4 cc 
1.2 cc 
2.0 cc 
2.5 cc 
3.6 cc 
4.6 cc 
7.0 cc 
8.4cc 
14.3 cc 
HC1.... 
0.4 
1.2 
2.0 
2.5 
3 6 
4.7 
7.0 
8.0 
11.8 
It was found that in normal KOFI or Ha OH solutions no 
measurable amount of hydrogen was evolved in 24 hours, the 
magnesium remaining perfectly bright. Solutions of magnesium 
nitrate when treated with magnesium yield nitrite and finally 
ammonia, which accounts for the small amount of hydrogen lib¬ 
erated by this salt as compared with other salts of mlagnesiunn 
From solutions of magnesium acetate and iodide magnesium 
also evolves hydrogen rapidly. A magnesium sulphate solution 
was treated with a large excess of finely divided magnesium, 
hut no reduction of the salt to sulphite took place. From a 
solution of crystals of MgCl 2 + 6H 2 0 in glycerine of sp. gr. 1.27 
magnesium evolves hydrogen; the action is m]uch increased 
upon heating. Anhydrous magnesium chloride (prepared from 
the double magnesium ammonium chloride) dissolved in gly¬ 
cerine of sp. gr. 1.27 acts slowly on magnesium; this action is 
greatly increased upon raising the temperature. The glycerine 
itself acts only very slightly on magnesium even on heating. 
From! MgCl 2 +6H 2 0 melted in its crystal water magnesium 
evolves hydrogen readily. A saturated solution of MgCl 2 + 
6H 2 0 in ether does not attack magnesium. 
From a solution of 1 gram-mol. Mg01 2 + 6 FLO in 99.5 per 
cent, alcohol a bar of m)agnesium the size above described, 
20 
