Polymers consisting of at least 85% of acrylonitrile are dissolved in aqueous zinc halide solutions by a process which comprises acidifying the zinc halide solution with a watersoluble non-oxidising acid which forms only colourless and water-soluble salts with the cations present in the solution, ...
the amount of acid being such as to reduce the pH of the solution to a value of a solution in water of the zinc halide at the same concentration, the reduce pH value not exceeding 4,0, and thereafter using the so-acidified solution as the solvent for the polymer, for example by polym...
State what is observed when hydrochloric acid is added to silver nitrate solution. View Solution Write the changes when Two drops of indicator methyl orange are added to diluteH2SO4 View Solution Exams IIT JEE NEET UP Board Bihar Board
Colour of chemical Ions in aqueous solution Name Formula Color Titanium (III)Ti3+ Violet Vanadium (II)V2+ Lavender Vanadium (III)V3+ Dark grey/green Vanadyl VO2+ Blue Pervanadyl VO2+ Yellow Chromium (III)Cr3+ Blue-green Chromate CrO4 2- Colorless or Yellow(sometimes)Dichromate Cr2O72- O...
A.The technique that I used many years ago, employed the use of a Chloral Hydrate Solution to stabilize the endpoint of a Zinc in Brass titration with E.D.T.A. Standard. This material is now a controlled substance in the USA ( I do not know about other countries). ...
Cadmium orange and red can be prepared by a reaction of a solution of a cadmium salt, such as cadmium chloride, with a solution of sodium sulfide and sodium selenide in the desired proportion. History of Use Cadmium pigments have been in use since about 1840 until today. They might get ba...
Cadmium yellow can either be prepared by heating of metallic cadmium with sulfur or by precipitation of the unsoluble cadmium sulfide by a reaction of a solution of a cadmium salt, such as cadmium chloride, with a solution of sodium sulfide. The pigment can also be prepared in the laboratory...
A huge volume of contaminated wastewater is discharged into the water bodies from textile industries. Therefore, water pollution is gradually becoming one
Solution UN 1866 polyester resin ground, which contained 1–1.5 % Norpol Nr1 hardener and polished with silicon carbide paper (see Fig.2). A Leica optical microscope (OM) with reflected light was used to examine the order and structure of the paint layers and the micrographs were taken ...
the amount of acid being such as to reduce the pH of the solution to a value of a solution in water of the zinc halide at the same concentration, the reduce pH value not exceeding 4,0, and thereafter using the so-acidified solution as the solvent for the polymer, for example by polym...