"Properties and Preparation Methods of Carbon Dioxide" Fuel PPT Courseware 2

Description

"Properties and Preparation Methods of Carbon Dioxide" Fuel PPT Courseware 2

1. Physical properties of carbon dioxide

Experiment: Verify that carbon dioxide is denser than air

Experimental operation

Tie a thin wooden stick to the iron stand, hang a small paper bag on each end of the wooden stick to keep it balanced, and pour carbon dioxide into one of the small paper bags.

Phenomenon

Pour the carbon dioxide into it and tilt the end downwards

in conclusion

Carbon dioxide is denser than air

2. Chemical properties of CO2

⑴ Under normal circumstances, CO2 cannot burn and cannot support combustion.

⑵ Cannot be used for breathing and non-toxic.

⑶ Reaction of CO2 and H2O

CO2 + H2O = H2CO3

Reason: Carbon dioxide can react with water to form carbonic acid. Carbonic acid turns purple litmus test solution red.

Give it a try:

1. Which of the following statements is correct ( )

A. Dry ice is solid water. B. CO2 is toxic and cannot be breathed.

C. Lime water can test the presence of CO2

2. Among the following uses of carbon dioxide, the ones related to both physical and chemical properties are ( )

A. Make dry ice B. Extinguish fire C. Make fertilizer D. Make refrigerant

Properties and uses of carbon dioxide

1. Physical properties

1. Normally, CO2 is a colorless and odorless gas, which is denser than air and can be dissolved in water.

2. Under certain conditions

CO2 (gas) → CO2 (liquid) → CO2 (solid)

2. Chemical properties

⑴ Under normal circumstances, CO2 cannot burn and cannot support combustion.

⑵ CO2 cannot be breathed and is non-toxic.

⑶ CO2 reacts with water: CO2 + H2O = H2CO3

⑷ Reaction of CO2 and limewater: CO2 + Ca(OH)2 = CaCO3 (white) + H2O

3. Uses of CO2 (fire extinguishing, refrigerant, industrial raw materials...)

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"Properties and Preparation Methods of Carbon Dioxide" Fuel PPT Courseware:

"Properties and Preparation Methods of Carbon Dioxide" Fuel PPT Courseware 1. Physical Properties of CO2 1. Under normal circumstances, ____ color ____ odorous gas 2. ____ dissolves in water (1 volume of water dissolves approximately 1 volume of CO2) 3. Denser than air ____. 4. Solid carbon dioxide is also called ____..

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Update Time: 2024-09-08

This template belongs to Chemistry courseware Cantonese Education Edition Ninth Grade Chemistry Volume 1 industry PPT template

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