Condition varied : Time of
Boiling.
60C.C. HCI (6 X normal strength)
were used in each experiment.
Condition varied : Amount of
Acid.
Time of Boiling : Four hours in
each experiment.
"is

•" 2

o^



If the dextrose were

nnt attacked by the

acid, there would be re>

diiced of Cu =» 0.4505.
There were reduced

ofCu:



°^^'^} 04337



0.4350



O,

o,



■^^v^^



o,
o,



i:?^}<'-^'^3



o:^^i^}-398*



0.2901 ) _ ^.
S-3S
-oil.
C C **

a M
O X c

< a



30C.C.
60C.C.
90C.C.
If the dextrose were
nut attacked by the
acid, there would be re-
duced of Cu — • 0.4505.
There vuere reduced
ofCu:



m O^ C



"AW^^



0.3977 \



o:^;^|°-3982



o:Sin°-3«"



Conditions varied : Time of
Boiling and Amount of Acid.
»o cc •
= P t; **



1»C.C.
6h'rs.
60C.C.
If the dextrose were
not attacked by the
acid, there would be
rethiced ofCu— 0.4570.
There were reduced
o(Cu:



0.2973 f ^^



^•^9on

o 2929 \ ^ ^



Inspection of Series No. 2 dextrose, shows :

1. That, dextrose in solution is attacked by hydrochloric acid
of six times the normal strength.
2. That, the amount of acid used being constant, the amount of
dextrose destroyed depends upon the length of time that the boil-
ing is continued.
3. That, the amount of dextrose thus destroyed is not the same
for corresponding periods of time, but rapidly increases as the time
of boiling is prolonged. Thus, the difierence in the amounts of
copper reduced, is : Between one and two hours' boiling, 0.0054 ;
between two and three hours' boiling, o.oi 20 ; between three and four
hours' boiling, 0.0179 ; between four and six hours' boiling, 0.1069.
