Kinetics of the Color-Fading Reaction of Phenolphthalein in Alkaline Solution Studied with a Simple and Economical Device (Record no. 45946)
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| 000 -LEADER | |
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| fixed length control field | 02492nam a22002057a 4500 |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20240530104037.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 240530b |||||||| |||| 00| 0 eng d |
| 022 ## - INTERNATIONAL STANDARD SERIAL NUMBER | |
| ISSN | 0021-9584 |
| 100 ## - MAIN ENTRY--AUTHOR NAME | |
| Personal name | Luo, Guan-Jie |
| 245 ## - TITLE STATEMENT | |
| Title | Kinetics of the Color-Fading Reaction of Phenolphthalein in Alkaline Solution Studied with a Simple and Economical Device |
| Remainder of title | (Journal Article) |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) | |
| Place of publication | Washington DC |
| Name of publisher | :American Chemical Society |
| Year of publication | ,2023 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Number of Pages | 4298–4306p. |
| 440 ## - SERIES STATEMENT/ADDED ENTRY--TITLE | |
| Title | Journal of Chemical Education |
| Volume number/sequential designation | Volume 100, 2023 - Issue 11, November 2023 |
| 505 ## - FORMATTED CONTENTS NOTE | |
| Formatted contents note | ***______{For Hard Copy, Please visit Library.}________***<br/><br/> |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc | Abstract: A simple photometric device was built to measure the kinetics of the title reaction. The device consisted of a green light-emitting diode (centered at 520 nm), a sample vial, a photodiode, and an Arduino microcontroller board. These parts were mounted on a black poly(lactic acid) holder which was manufactured by utilizing three-dimensional printing. Adequate sensitivity and dynamic range (linear detection range from 2 × 10–3 to 0.9 in absorbance, base 10) and time resolution (ca. 6 × 10–3 s) have been achieved. The time-resolved absorbance of the pink form of phenolphthalein was recorded automatically. The time scale of the forward reaction can be controlled by [OH–]. Evidence of reaching a chemical equilibrium was observed at conditions of higher concentration of phenolphthalein and lower [OH–]. We also demonstrated direct observation of the slow reversed reaction (taking ca. hours). Factors affecting the reaction kinetics like the ionic strength and organic solvents have also been tested. For a laboratory class, the basic goal may include the kinetics of the forward reaction and a simple description of the chemical equilibrium. If time allows, the reversed reaction (color reappearing) may be demonstrated. In a test run, the participating high school students positively agreed that this activity had increased their related ability, while a minor portion of them were less confident on more complicated knowledge items like using the Beer–Lambert law, measuring the lifetime, and knowing the evidence of the reverse reaction. |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical Term | First-Year Undergraduate/General| Physical Chemistry| Hands-On Learning/Manipulatives| Acids/Bases Kinetics |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Wu, Pei-Hsuan | Lin, Ming-Le | Chou, Fang-Fei | Lin, Jim Jr-Min |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | https://doi.org/10.1021/acs.jchemed.3c00390 |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Koha item type | Periodicals |
| Lost status | Damaged status | Home library | Current library | Date acquired | Koha item type |
|---|---|---|---|---|---|
| RIE BPL Library | RIE BPL Library | 30.05.2024 | Periodicals |