262        ACTION  OF  WATER  CN  CHLORIDE  OF  LIME,  &C. 
approximates  the  amount  required  by  theory.  The  reaction  is 
as  follows : — 
CaO,C10+OaCl+2HCl=2CaCl+2HO+201. 
26-72  of  hypochlorite  and  20-72  of  chloride  of  calcium  being 
present  in  100  parts  of  chloride  of  lime,  there  would  be  then 
4744  p.  c.  of  chloride  of  lime,  requiring  27-24  of  hydrochloric 
acid,  the  30-46  of  hydrate  of  lime  requiring  also  30-01  of  acid, 
making  57-25  together.    Experiment  gave  57-206. 
The  lime  of  the  4-79  of  chloride  of  calcium,  not  having  been 
saturated  by  the  acid,  would  remain  in  excess. 
50  grammes  of  chloride  of  lime  were  treated  with  ten  suc- 
cessive gradually  increasing  portions  of  water.  80  grammes  of 
water  were  employed  for  the  first  lixiviation  ;  the  mass  being 
thrown  on  a  filter,  20  grammes  of  filtrate  were  obtained ;  a  second 
lixiviation  yielded  30  grammes  of  solution  ;  a  third,  100  ;  a  fourth 
120,  etc.    The  results  are  shown  in  the  table  below. 
These  solutions  were  analyzed  immediately  after  filtration  to 
avoid  as  much  as  possible  the  action  of  the  air.  The  chlorine 
and  hypochlorous  acid  were  estimated  as  before  ;  the  same  esti- 
mations were  also  made  in  the  deposit  remaining  after  the  tenth 
washing.     The  following  numbers  were  obtained  : — 
Atoms  of  CaCl 
Solution. 
CaO,C10 
CaCl. 
for  1  atom  of 
CaO,C10. 
1 
,    .  4-5371 
15-9437 
4-5279 
2 
.    .  5-2254 
7-6451 
1-8851 
3 
,    .  3-6968 
2-6064 
0-9084 
4 
.  1-6004 
0.9897 
0-7968 
5 
.  0-4672 
0-2971 
0-8193 
6 
.  0-1600 
0-1198 
0-9647 
7 
,    .  0-0602 
0-0487 
1-0422 
8 
.  0-0128 
9 
.  0-0060 
0-0067 
1-4319 
10 
.    •  0-0039 
0-0043 
14521 
Residue 
.    .  0-1389 
0-0321 
0-2981 
The  following  conclusions  are  drawn  from  these  experiments: 
1st.  The  first  portion  of  water  (80  grammes)  dissolved  all  the 
chloride  of  calcium,  as  the  last  portions  contained  very  little. 
