sodium hydroxide; sodium perchlorate in water Kinetics; at 10-55°C, in 0.2-1.2 M aq. NaOH, μ=1.2 M (NaClO4); studied by stopped-flow spectrophotometry;

zinc in hydrogenchloride to soln. of NaAsO2 in H2O added concd. HCl; Zn filings added;

hydrogenchloride; KIO3; water in water Kinetics; byproducts: HCN; Reduction of Mn(IV) cpd. by As(III) in acidic media at various concns., mechanism discussed.; No isolation of products, reaction was observed by UV spectroscopy and titration with MnO4(1-) soln.;

AgNO3; starch; agar gel in sulfuric acid Kinetics; aq. H2SO4; by mixing of soln. of NaAsO2 with an equimolar amt. of concd. sulfuric acid; agar gel soln., starch soln., AgNO3 and NaIO3 solns. were added; planar reactor; 25°C; dc voltage (-1 V); elec. field: -5 - +5 V/cm; S0(stoichiometry factor): 1.91-3.34; expts. were monitored by a CCD camera and recorded on a VHS videorecorder;

hydrogenchloride; KIO3; water in water Kinetics; byproducts: HCN; Reduction of Mn(IV) cpd. by As(III) in acidic media at various concns., mechanism discussed.; No isolation of products, reaction was observed by UV spectroscopy and titration with MnO4(1-) soln.;