Page 27 - Demo

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Classic Experiments for General Chemistry
25
Classic Experiments for General Chemistry,
continued
Oxidation–Reduction Titrations—Laboratory Kit
By: The Flinn Staff
Students standardize a solution of potassium permanganate by redox titration with a standard solution of iron(II) ions. Then they will take the potassium permanganate solution and titrate it against a solution of oxalic acid. The data will then be used to calculate the exact concentra- tion of the oxalic acid solution. Students gain experience in the process of titration and standardization, writing half reactions, and calculating molar concentrations and oxidation numbers.
Complete for 24 students working in pairs.
pH Properties of Buffer Solutions—Laboratory Kit
By: The Flinn Staff
In this laboratory, students investigate the properties of buffer solutions. The students make two ideal buffer solutions, one consisting of a weak acid and its conjugate base, and the other, a weak base and its conjugate acid. The initial pH of each solution is determined. Strong acid and strong base are then added to each buffer in a series of steps, and the pH is determined after each addition. The resulting pH values are compared to calculated values for each buffer. A challenging lab to test students’ understanding of pH and buffer chemistry.
Complete for 24 students working in pairs.
Separation and Qualitative Determination
of Cations and Anions—Laboratory Kit
By: The Flinn Staff
In this semi-microscale laboratory, students analyze two solution sets of four cations and four anions. For each set, a specific qualitative scheme is followed to separately detect each of the four ions present. Once these determinations are completed, students are given two unknown solution sets of cations and anions to analyze. By following the qualita- tive schemes, students determine which cations and anions are present and which are absent from the two samples. Students become familiar with various laboratory techniques associated with qualitative analysis, with an emphasis on maintaining accurate records of laboratory results.
Complete for 24 students working in pairs.
Determination of the Empirical Formula
of Silver Oxide—Laboratory Kit
By: The Flinn Staff
Students decompose silver oxide by heating a sample in a crucible. By using analytical techniques, the empirical formula of silver oxide is deter- mined. The Law of Multiple Proportions and the Law of Conservation of Mass are demonstrated. Students gain valuable hands-on experience using an analytical balance and a crucible. An alternate procedure for the laboratory is included along with supplemental questions.
Complete for 24 students working in pairs.
Oxidation–Reduction Titrations—Laboratory Kit AP7958
pH Properties of Buffer Solutions—Laboratory Kit AP7959
Separation and Qualitative Determination of Cations and Anions—Laboratory Kit AP7960
Determination of the Empirical Formula of Silver Oxide—Laboratory Kit AP7961
Catalog No.
Description
Price/Each
AP7958
Oxidation–Reduction Titrations—Laboratory Kit
$39.00
Catalog No.
Description
Price/Each
AP7959
pH Properties of Buffer Solutions—Laboratory Kit
$54.75
Catalog No.
Description
Price/Each
AP7960
Separation and Qualitative Determination of Cations and Anions—Laboratory Kit
$99.75
Catalog No.
Description
Price/Each
AP7961
Determination of the Empirical Formula of Silver Oxide—Laboratory Kit
$92.35
CLASSIC EXPERIMENTS FOR GENERAL CHEMISTRY continued on next page.