160 
IOWA ACADEMY OF SCIENCES. 
to a clear blue solution due to salts of copper. The copper 
used was in the form of bright wire gauze, such as is com- 
monly used in combustion in organic analysis. The metal 
dissolves rapidly in 2N. acid at 50 degrees. 
1. .2778 grams copper gave .0528 HC1, corresponding to . 2766 grams Cu. 
2. -5288 grams copper gave J000 HC1, corresponding to 5236 grams Cu. 
. . " . \ 
Action of Chloric Acid on Cadmium. 
The action of chloric acid on cadmium is in every way 
similar to its action on copper, it being one of simple oxi- 
dation and the solution of the oxide in the excess of acid, 
no gas being given off. Ordinary commercial cadmium 
was used. The acid was 2 normal. In the first case the 
reaction went on at room temperature and in the second 
at 50° . 
1. .4732 grams cadmium gave .0520 grams HC1, corresponding to .4810 Cd . 
2. .4091 grams cadmium gave 0438 grams HC1, corresponding to .4052 Cd. 
The action of chloric acid on certain other metals has 
been studied to some extent. It acts with exceeding slow- 
ness on mercury and antimony even when at full strength 
and at 70°, and no attempt was made to determine the 
quantitative relationship. Nickel dissolves readily and 
apparently in quite the same way as copper and cadmium. 
Bismuth is rather slowly oxidized and only a small, portion 
of the product goes into solution. In one experiment 
.3698 grams of bismuth gave .0282 HC1, corresponding to 
.3624 Bi. 
In a recent communication on silver as a reducing 
agent* it was shown that silver reduces chloric and iodic 
acid directly to hydrochloric and hydriodic acids, and ac- 
cording to the equation as there given for chloric acid . 
6Ag+6HC10 3 =5AgC10 3 +AgCl+3H s 0. 
The same general reaction has since been found to hold 
true in the case of bromic acid and silver. There was no 
evidence in any case of the formation of any intermediate 
product, in the reduction of the acid, but in each case the 
reaction ran smoothly as above represented. Omitting the 
* Hendrixson t , Jour. Amer. Chem. Soc. 25. 
