The chemical equation for the reaction between hydrogen and copper oxide is presented as follows:
The chemical equation for the reaction between hydrogen and copper oxide is: H?+CuO=Cu+H?O (heating). Hydrogen and copper oxide undergo a displacement reaction to produce copper and water.
Hydrogen can undergo a displacement reaction with copper oxide. The chemical equation for the reaction between hydrogen and copper oxide is: H?+CuO=Cu+H?O (heating). The phenomenon is that ① a red substance is generated on the surface of the black solid; ② small water droplets are generated.
At normal temperature and pressure, hydrogen is an extremely flammable gas, colorless, transparent, odorless and tasteless, difficult to dissolve in water. Hydrogen is the least dense gas known in the world. The density of hydrogen is only 1/14 that of air. Hydrogen is an extremely flammable gaswith a flash point of only 574°C. It can burn when the volume fraction in air is between 4% and 75%.
Hydrogen is the main industrial raw material and the most important industrial gas and specialty gas. It has important applications in petrochemical industry, electronics industry, metallurgical industry, food processing, float glass, fine organic synthesis, aerospace, etc. Wide range of applications.
Experimental steps:
(1) On the vertical column of the iron bracket, wind the thick copper wire into a spiral shape, place it on the outer flame of the lamp alcohol, and heat it red at high temperature, so that a sufficient amount of black copper oxide is generated in the spiral part of the copper wire.
(2) Use an Erlenmeyer flask (or gas collection bottle) to collect a full bottle of hydrogen. Remove the fheat it to red-hot copper from the alcohol flame and let it cool slightly. After having students observe the black copper oxide on the surface of the copper wire, slowly extend it into the mouth of the conical bottle filled with hydrogen. It can be seen that the copper wire quickly turns purple; then take it out, the copper wire oxidizes and turns black again, then is inserted into the Erlenmeyer flask, and the copper wire turns red again. This can be repeated several times. .
Phenomena: ① A red substance is generated on the surface of a black solid; ② Small water droplets are generated.
Chemical equation: CuO+H?=Cu+H?O (heating/△).
HCl+NaOH=NaCl+HO.
The chemical formula of sodium hydroxide: NaOH; the chemical formula of acid hydroxide: HCl.
The ionic equation for the reaction between sodium hydroxide and hydrochloric acid: OH-+H+=HO Solution: Hydrochloric acid dilue reacts with sodium hydroxide solution to form sodium chloride and water. The chemical equation for the reaction is. : HCl+NaOH= NaCl+HO, hydrogen chloride, sodium hydroxide and sodium chloride are all soluble substances and strong electrolytes.