"Carbon Dioxide" PPT courseware

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"Carbon Dioxide" PPT courseware

Part One: Laboratory Production of Carbon Dioxide

1. Raw materials: marble CaCO3 dilute hydrochloric acid HCl

2. Principle: CaCO3+2HCl=CaCl2+H2O+CO2↑

3. Device:

reaction device

collection device

4. Steps:

1) Check the air tightness of the device;

2) Add marble (or limestone) to the Erlenmeyer flask;

3) Connect the device;

4) Add dilute hydrochloric acid to the long-neck funnel;

5) Use the upward air exhaust method to collect gas;

6) Place a burning wooden stick on the mouth of the gas collecting bottle to check if it is full.

5. Things to note:

1). The lower end of the long-neck funnel should extend under the liquid surface;

Prevents generated gas from escaping from the funnel

2). The tube extending into the Erlenmeyer flask should be shorter;

Quickly drain the original air in the Erlenmeyer flask

3). The tube in the gas collecting bottle should be close to the bottom;

Make the collected carbon dioxide gas purer

Carbon dioxide PPT, Part 2: Industrial production of carbon dioxide

1. Raw materials: limestone

2. Principle: CaCO3==CaO + CO2↑

3. Equipment:

Carbon dioxide PPT, part 3: Application of carbon dioxide

1. Use as gas fertilizer to increase greenhouse crop yield;

(Carbon dioxide is the raw material for plant photosynthesis)

2. Dry ice can be used as a refrigerant to preserve food and create artificial rainfall;

(Dry ice will sublime and absorb a lot of heat)

3. Use as fire extinguishing agent;

(Carbon dioxide does not burn, does not support combustion, and is denser than air)

Carbon Dioxide PPT, Part 4: Classroom Exercises

1. Which of the following statements about CO2 is correct: ( )

A. Carbon dioxide is a substance that turns purple litmus red

B.CO2 is composed of carbon atoms and oxygen atoms

C. The physical properties of CO2 that do not support combustion can be used to extinguish fires.

D. Solid CO2 is also called dry ice

2. Commonly used methods for producing carbon dioxide in laboratories are ( )

A. Carbon and oxygen B. Limestone and hydrochloric acid

C. Marble and dilute sulfuric acid D. Sodium carbonate and hydrochloric acid

Keywords: Zhejiang Education Edition eighth grade science PPT courseware for the second volume free download, carbon dioxide PPT download, .PPT format;

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Update Time: 2024-10-06

This template belongs to science courseware Zhejiang Education Edition Eighth Grade Science Volume 2 industry PPT template

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