"Research on Carbon Dioxide Production" Carbon and Carbon Oxides PPT Courseware 6

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"Research on Carbon Dioxide Production" Carbon and Carbon Oxides PPT Courseware 6

Explore the ideal raw material for producing carbon dioxide in the laboratory

1.Choose raw materials

2. Determine experimental raw materials

React marble or limestone with dilute hydrochloric acid to produce carbon dioxide gas

3. Chemical reaction equation:

CaCO3 + 2HCl = CaCl2 + H2CO3

CaCO3+2HCl=CaCl2+H2O+CO2↑

Devices for producing gas in the laboratory include: generation device and collection device (What factors should be considered in the selection of gas generation device and collection device?)

Generating device

state of reactants

solid to solid reaction

Solid and liquid reactions

liquid to liquid reaction

Reaction conditions (whether heating, catalyst addition, etc. are required)

collection device

Air exhaust method

Denser than air: upward exhaust method

Denser than air: downward exhaust method

Drainage method (not easily soluble in water, does not react with water)

Practice in class

1. In laboratories, two solids, anhydrous sodium acetate and soda lime, are commonly used to produce methane gas by heating. The density of methane is smaller than that of air and is extremely difficult to dissolve in water. Please answer based on the above content: The device that can be used when producing methane is the same as the generating device used in the laboratory to produce __________; the device that can be used when collecting methane is __________ or __________.

2. Which of the following experimental operations is correct ( ).

A. When collecting gas using the drainage method, collection can begin as soon as bubbles appear at the mouth of the air tube.

B. When collecting gas using the air exhaust method, just extend the air guide tube into the mouth of the test tube.

C. When collecting gas by drainage method, it can only be collected when bubbles are continuously and evenly generated at the mouth of the conduit.

D. When collecting gas using the exhaust method, the mouth of the conduit should be close to the bottom of the gas collecting bottle.

3. Scale is a mixture composed of magnesium hydroxide and calcium carbonate as the main components. To prove that there is calcium carbonate in scale, the chemical reagent required is ( )

A. Clarified lime water and oxygen B. Hydrochloric acid and clarified lime water

C.Carbon dioxide and water D.Quicklime and water

After studying this topic you should know:

1. When producing gas in the laboratory, the generating device must be selected based on the state of the reactants and reaction conditions.

2. When collecting gas, select an appropriate collection device based on the water solubility and density of the gas.

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Update Time: 2024-10-06

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