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Babincáková, Mária – Journal of Chemical Education, 2020
Knowing the volume of evolved gases is helpful to select an optimal leavening agent for a particular application. The comparison of leavening agents, their reactions through the baking process in the modern and attractive way, is presented here. A gas pressure sensor probe was used to monitor the pressure change due to the carbon dioxide produced…
Descriptors: Science Instruction, Chemistry, Scientific Concepts, High School Students
Gonçalves, Bárbara Rezende; Silva-Caldeira, Priscila Pereira – Journal of Chemical Education, 2019
Most didactic lab experiments deal with the influence of temperature, concentration, pressure, surface area, and catalysts on chemical kinetics; however, few of them explore the influence of light radiation and the presence of inhibitor agents on reaction rates. In order to investigate the effects of the radiation source and the presence of…
Descriptors: Light, Food, Laboratory Experiments, Science Experiments
Danielson, Neil D.; Danielson, Alex P. – Journal of Chemical Education, 2015
A pipet filler port has been constructed from a 1/4 in. NPT-1/4 in. or -3/8 in. barbed end Kynar plastic male connector fitting and a washer (cut from a latex rubber hose) inserted into the NPT end. The barbed end can secure reliably different sized rubber bulbs such as 1 oz (30 mL pipet capacity) and 2 oz (60 mL pipet capacity) types, and the 1/4…
Descriptors: Undergraduate Students, High School Students, Hands on Science, Measurement Equipment
Jensen, William B. – Journal of Chemical Education, 2007
The history behind the association of Avogadro's name related to the hypothesis that equal volumes of gases at constant temperature and pressure contain equal numbers of molecules is explored. The findings suggest that the index entry "Avogadro's Number" did not become common in American college texts until the 1930s and was rare in American high…
Descriptors: Chemistry, High School Students, College Science, Secondary School Science
Kang, Seong-Joo; Ryu, Eun-Hee – Journal of Chemical Education, 2007
This article presents the development of a carbon dioxide fountain. The advantages of the carbon dioxide fountain are that it is odorless and uses consumer chemicals. This experiment also is a nice visual experiment that allows students to see evidence of a gaseous reagent being consumed when a pressure sensor is available. (Contains 3 figures.)…
Descriptors: Chemistry, College Science, Secondary School Science, Undergraduate Students