in acetic acid

in neat (no solvent) reduction on bombardment with electrons;;

PbO in neat (no solvent) byproducts: CO;

in further solvent(s) dissolving in tartaric acid;;

in water treatment of PbCO3 with a small excess of aq. HCO2H-soln., cooling to 0°C; crystn.;; washing with H2O, drying at 110°C;;

formic acid in formic acid metal carbonate dissoln. in formic acid; recrystn. twice;

in water aq. soln. of educts evapd. at 40°C;

H2SO4*H2O; water in tetrachloromethane; sulfuric acid byproducts: CO2; aq. H2SO4; KMnO4 was added to 86 percent aq. H2SO4 in the presence of CCl4 at +5 °C, stirring for 10 min, the formed Mn2O7 in CCl4 was reacted with the metal-compd. and a catal. amt. of H2O, H2SO4:CCl4 ratio=15:200 (v/v), stirring for 10 min; H2O was added, 10 min stirring, aq. phase was sepd., the anal. of soln. was showed the presence of lead permanganate (yield was 18.7percent), which decompd. during crystn.;