化学实验现象（Phenomena of chemical experiment）.docVIP

化学实验现象（Phenomena of chemical experiment） Give you my personal information collected two high school chemistry experiment phenomenon. 1. magnesium bars burn in the air: emit glare, emit large amounts of heat, produce white smoke, and form a white substance. 2. charcoal burns in oxygen: it emits white light and gives off heat. 3. sulfur burns in oxygen: a bright bluish violet flame emits heat, producing a pungent odor. 4. wires burn in oxygen: they burn violently, and Mars sends forth heat, producing black solid matter. 5. heating test tube of ammonium bicarbonate: a pungent odor, gas generated in the test tube droplets generated. 6. hydrogen burns in the air: Flames appear pale blue. 7. hydrogen burns in chlorine gas: a pale flame is produced and a large amount of heat is produced. 8. in the test tube, hydrogen was used to reduce copper oxide: black copper oxide was changed into red substance, and there was droplet formation at the test tube mouth. 9., the use of charcoal powder to reduce copper oxide powder, so that the gas generated into the clear lime water, black copper oxide into shiny metal particles, lime water turbidity. 10. carbon monoxide burns in the air: a blue flame gives off heat. 11. add hydrochloric acid to a test tube containing a small amount of potassium carbonate solids: gas generation. 12.. The crystal of copper sulfate in the test tube: the blue crystal is gradually changed into white powder and a droplet is formed at the mouth of the tube. 13. sodium in chlorine combustion: intense combustion, the formation of white solid. 14. lit pure chlorine, with dry beaker cover in flames: a light blue flame, beaker wall droplet formation. 15. to the solution containing Cl added with silver nitrate solution with nitric acid, white precipitate. 16. to the solution containing SO42 - barium chloride solution by adding nitric acid, white precipitate. 17., the area of rust nails into the test tube of dilute sulfuric acid, and heating: rust gradually dissolved,