J328 
Potassium oxalate and bromine. 
Quality of Light 
Time of 
exposure 
Amount of 
bromine 
added 
in grams 
Unchanged 
bromine 
Volume of solution 
a) Sunlight 
30' 
0.15872 
0.01258 
1 N 
1 10 c.c. ^ Potassium 
Darkness 
30' 
0.15872 
0.02831 
1 oxalate and 25 c.c. 
bromine water. 
b) Diffused light 
29' 
Do 
0.02417 
1 
1 Do 
Darkness 
29' 
Do 
0.02813 
Oxalic acid and bromine. 
a) Sunlight 
11' 
0.06177 
0.00103 j 
Diffused light 
11' 
0.06177 
0.03346 j 
b) Sunlight 
35' 
0.12354 
0.00102 j 
Darkness 
35' 
0.12354 
0.05678 : ( 
c) Diffused light 
60' 
0.12698 
0.00485 , 1 
Darkness 
60' 
0.12698 
0.05834 ( 
d) Diffused light 
95' 
0.15872 
0.00785 j 
Darkness 
95’ 
0.15872 ■ 
0.06938 i 
Tartaric acid and bromine. 
a) Sunlight 
40' 
0.06527 
0.01035 j 
Darkness 
40' 
Do 
0.05875 ) 
b) Sunlight 
60' 
Do 
0.00835 j 
Darkness 
60' 
Do 
0.04875 i 
c) Diffused light 
80' 
Do 
0.02238 j 
Darkness 
80' 
Do 
0.03975 t 
d) Diffused light 
120' 
Do 
0.01725 1 
Darkness 
j 120' 
Do 
0.02987 i 
and 10 c.c. bromine 
water. 
N 
25 c.c. — oxalic acid 
and 20 c.c. bromine 
water. 
N 
50 c.c. oxalic acid 
and 20 c.c. bromine 
water. 
N 
50 c.c. oxalic axid 
and 25 c.c. bromine 
water. 
_ tartaric acid 50 c.c. 
5 
and 10 c.c. bromine 
water. 
Do 
Do 
Do 
