Ah, chemical reactions and gases ... there always seems to be more to learn. This short and detailed video segment describes double displacement reactions (gas evolution reactions) to create a gaseous byproduct. Four gases discussed in this segment are H2S, H2CO3, H2SO3, and NH4OH.

 

 

Concepts

anions, gas exchange, chemical reactions, magnesium, sulfur, acids, calcium carbonate, hydrogen bonds, carbon dioxide

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Additional Tags

science

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Instructional Ideas

• Emerging chemists could collaborate in groups to gather a better understanding after viewing the segment
• Use balloons, gumdrops, or other tangible items to describe reactions to ensure understanding of the concepts

Classroom Considerations

• Previous knowledge of double displacement reactions is needed prior to viewing this video segment
• The final in a series of six related videos

• This video is hosted on YouTube

Pros

• The video is short enough to capture attention of all pupils in the classroom
• Descriptions of reactions are explained in such a way to appeal to learners of all abilities

Cons

• None