In the original invention, bromide-containing brines are treated with sulfuric acid and bleaching powder to oxidize bromide to bromine, which remains dissolved in the water.
22.
It was not until 1799, when Charles Tennant patented a process for producing solid bleaching powder ( calcium hypochlorite ) that it became a commercial success.
23.
On Saturday afternoon, Sanjay Gupta, the man in charge of relief operations, was talking about preventing disease with bleaching powder when the building began to quiver.
24.
O Shea s most important contributions to pure chemistry are scientific articles on the Constitution of Bleaching Powder and Preparation of Pure Iron ".
25.
Scottish chemist and industrialist Charles Tennant first produced a solution of calcium hypochlorite ( " chlorinated lime " ), then solid calcium hypochlorite ( bleaching powder ).
26.
The killing method included administering sodium pentothal directly into their hearts, poisoning, electrocuting, clubbing to death and burying alive in pits covered with bleaching powder and pesticides.
27.
He said there were also a few hundred animal carcasses strewn across the farm fields and by village streams, and bleaching powder had been sprinkled on them to stop the stench.
28.
It is also used in estimating volumetrically the concentrations of certain compounds in solution ( hydrogen peroxide, for instance ) and in estimating the chlorine content in commercial bleaching powder and water.
29.
The Gas Scattering Vehicle version could scatter mustard gas chemical agent with an 8m width and the Disinfecting Vehicle version scattered " bleaching powder to counteract the poison gas " or pathogenic agents.
30.
So, in this particular proposed application, H 2 CO3 from CO 2 and moisture on the bleaching powder, acts on the CaCl 2 to release some HCl which acts on the HClO releasing Chlorine:
