High school chemistry burns and the color of the flame

(1) The general conditions for combustion

1. The temperature reaches the ignition point of the combustible

2. There are strong oxidants such as oxygen, chlorine, potassium permanganate and so on

3. (Explosives generally have their own oxidative conditions, such as nitroglycerin, trinitrotoluene, gunpowder, etc., as long as the temperature conditions are reached, they can burn rapidly and explode in a closed state)

(2) In which gases can magnesium be burned?

1, magnesium in air or oxygen combustion 2, magnesium in chlorine combustion 3, magnesium in nitrogen combustion 4, magnesium in carbon dioxide combustion

(3) The color of the flame and the phenomenon of the expression of the product

1, hydrogen burning in the air - light blue flame

2, hydrogen in the chlorine combustion--- pale flame, there is a white mist at the mouth of the bottle.

3. Methane burns in the air--- light blue flame

4, alcohol in the air burning --- light blue flame

5. Sulfur burns in the air--- a faint light blue flame, generating a gas with a strong irritating odor.

6. Sulfur burns in pure oxygen--- bright blue-purple flame, generating a gas with a strong irritating odor

7. Hydrogen sulfide burns in the air--- light blue flame, generating a gas with a strong irritating odor.

8, carbon monoxide in the air to burn --- blue flame

9, phosphorus burning in the air, white flame, there is a thick white smoke

10, ethylene burning in the air, the flame is bright, there is black smoke

11, acetylene in the air burning, the flame is very bright, there is a thick black smoke

12, magnesium burns in the air, emitting a dazzling white light

13, sodium burning in the air, the flame is yellow

14, iron burns in oxygen, Mars is radiant, (no flame) generated by the formation of iron tetroxide melts and drips.

(3) Flame color reaction (experimental operation?)

1. The compound of sodium or sodium is burned on a colorless flame, and the flame is yellow

2. The flame color reaction of potassium or potassium compound is purple (to be observed through blue cobalt glass)