化学----常见物质的物理性质归纳（Chemistry -- the physical properties of common substances are summed up）.doc

化学----常见物质的物理性质归纳（Chemistry -- the physical properties of common substances are summed up） Physical properties of common substances are summarized (for high school) 1., the law of color (1) common material color A substance with red as its base color Red: water insoluble Cu, Cu2O, Fe2O3, HgO, etc.. Lye in phenolphthalein, acid, methyl orange, and pH encountered strong acid litmus test and fuchsin. Orange: concentrated bromine, methyl orange solution, mercuric oxide etc.. Brownish red: Fe (OH) 3 solid, Fe (OH) 3, water-soluble colloid, etc.. Substance with yellow as base color Yellow: gold, silver iodide, silver phosphate, sulfur, pyrite and chalcopyrite are insoluble in water (CuFeS2). Water soluble FeCl3 and methyl orange in alkaline solution, sodium flame and TNT. Light yellow: silver bromide, silver, sulfur and carbon make precipitation sulfur in CS2 solution, and yellow phosphorus, Na2O2, fluorine gas. Brownish yellow: Copper burns in chlorine gas, producing CuCl2 of smoke. A substance with brown or brown base colors Light brown, brown water iodine iodine, iron burning in chlorine to generate FeCl3 smoke A substance with blue as its base color Blue: new Cu (OH) 2 solid, copper sulfate, copper nitrate, solution of starch and iodine blue litmus test solution, alkali blue, blue, with a weak pH test paper. Light blue: ozone, liquid oxygen, etc. Blue flame: sulfur, hydrogen sulfide, carbon monoxide flame. Methane, hydrogen flame (blue is susceptible to interference). A substance whose color is green Light green: Cu2 (OH), 2CO3, FeCl2, FeSO4, 7H2O. Green: color of concentrated CuCl2 solution and pH test paper at about pH=8. Dark green: K2MnO4. Yellow green: Cl2 and its CCl4 extract. According to the material for the color purple KMnO4 is a deep purple, red purple, iodine solution in CCl4 extract, iodine vapor, neutral pH, K + ion strip color flame etc.. The black color material Black: carbon, activated carbon, charcoal smoke, idle, copper oxide, iron oxide, copper sul