Filling a Plastic Bag with Carbon Dioxide: A Student-Designed Guided-Inquiry Lab for Advanced Placement and College Chemistry Courses

详细信息    查看全文

• 作者：Laura M. Lanni
• 刊名：Journal of Chemical Education
• 出版年：2014
• 出版时间：September 9, 2014
• 年：2014
• 卷：91
• 期：9
• 页码：1390-1392
• 全文大小：261K
• ISSN：1938-1328

文摘

A guided-inquiry lab, suitable for first-year general chemistry or high school advanced placement chemistry, is presented that uses only inexpensive, store-bought materials. The reaction of sodium bicarbonate (baking soda) with aqueous acetic acid (vinegar), under the constraint of the challenge to completely fill a sealable plastic bag with the gaseous carbon dioxide product, is presented to students of chemistry. Students must marshal their knowledge of non-STP gas stoichiometry, including the often misunderstood concept of limiting and excess reagents, to successfully complete the task. This contribution is part of a special issue on teaching introductory chemistry in the context of the advanced placement (AP) chemistry course redesign.

Keywords:

First-Year Undergraduate; General; High School; Introductory Chemistry; Physical Chemistry; Laboratory Instruction; Hands-On Learning; Manipulatives; Inquiry-Based/Discovery Learning; Acids; Bases; Gases; Stoichiometry