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

Description

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

1. Physical properties of CO2

1. Under normal circumstances, gases with ____ color and ____ smell

2. ____ is soluble in water (1 volume of water dissolves approximately 1 volume of CO2)

3. Denser than air____.

4. Solid carbon dioxide is also called _________. It can absorb heat when _________, so it can be used as ____________ and ____________.

2. Chemical Properties of CO2

Experiment 1: Can it support combustion?

Steps: Pour carbon dioxide gas into a beaker containing a lit candle

Phenomenon: Candles are extinguished sequentially from bottom to top

Conclusion: 1. Carbon dioxide cannot burn and does not support combustion

2. Carbon dioxide is denser than air (physical property)

Experiment 2: Can it react with water?

Steps: Take about 2 ml of carbon dioxide aqueous solution and add a few drops of purple litmus solution to it;

Heat the reddened solution;

Phenomenon: purple litmus solution turns red,

The solution changes from red to purple when heated

Conclusion: 1. Carbon dioxide reacts with water to form acidic substance (carbonic acid)

CO2 + H2O == H2CO3

2. Acidic substances (carbonic acid) are unstable and easy to decompose

H2CO3 == H2O + CO2

In-person testing

1. Among the following changes, CO2 only undergoes physical changes ( )

A. Dissolved in water B. Dissolved in lime water

C. Carry out photosynthesis D. Make dry ice

2. CO2 can make purple litmus test solution turn red because ( )

A. Denser than air

B. Can be dissolved in water

C. Chemical reaction with water to form carbonic acid

D. CO2 molecules can react directly with purple litmus

3. When identifying the three gas bottles of CO2, O2 and air, the simplest and feasible method is ( )

A. Use burning wooden sticks to insert into the gas collecting bottles respectively.

B. Add lime water and shake

C. Drop the purple litmus test solution separately

D. Add water separately and shake

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

"Properties and Preparation Methods of Carbon Dioxide" Fuel PPT Courseware 2 1. Experiment on the physical properties of carbon dioxide: verify that the density of carbon dioxide is greater than that of air. Experimental operation: Tie a thin wooden stick on an iron stand, and hang a small paper bag on each end of the wooden stick. , to keep it balanced, to...

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Update Time: 2024-10-19

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

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