Schule, Abteilung: HBLVA17 Chemie Jahrgang: 3. Jahrgang Lehrer/in: DI. Bert Sefcik Schuljahr: 2012/2013 Gegenstand: Analytische Chemie Thema: Thin Layer Chromatography (TLC) Activity type/s 1. Reading a text 2. Completing an illustration 3. Listening to a presentation, asking questions and taking notes. 4. Asking questions and giving the correct answers (question loop) Classroom format 1. Individual work 2. Individual and pair work 3. Individual work 4. Whole class Time 90 minutes Procedure 1. Students get a text which describes the fundamentals of the thin layer chromatography (TLC). They also get a list of specific keywords explained in English. The students read the text and should try to understand it with the help of the explained keywords. 2. Students complete an illustration with the help of these texts. Then students compare their results with a partner. 3. Students listen to a presentation about thin layer chromatography given by the teacher. If necessary, they can ask questions. As the students will have to do a TLC in the laboratory there is an explanation how to calculate the results at the end of the presentation. 5. Students consolidate the content in a question loop activity. (For detailed information on the procedure see the teacher’s version below.) Sometimes it helps for the understanding of the content to run through the whole question loop twice. Resources Handouts, strips of paper for the question loop Content-related Students know the fundamentals of thin layer chromatography. learning outcome Students understand the concept of TLC and are ready for their practical work in the laboratory. Students understand advantages and disadvantages of TLC and can calculate the results of their practical work. Language-related Students can read and listen for detail. learning outcome Students can read for detail and complete a graph. Students can form questions and find the correct answers. Students can ask questions. Source/s DI. Bert Sefcik – powerpoint presentation (graphics) Brunda, Sefcik: Arbeitsbuch für analytische Chemie und das analytische Labor Band 3, neu überarbeitete Auflage 2009, Eigenverlag 997 M. Brunda, B. Sefcik Vocabulary: Kellner R., et.al.: Analytical Chemistry. 2nd Edition. Wiley, 2004. DI. Bert Sefcik AyC – Analytische Chemie – 3. Jahrgang Student’s version Thin Layer Chromatography (TLC) Activity 1: Read the text. Have a look at the list with TLC specific keywords to make sure that you understand what the text is about. DI. Bert Sefcik AyC – Analytische Chemie – 3. Jahrgang Activity 2: Complete the illustration below with the help of the text from activity 1. Then get in pairs and compare your results. DI. Bert Sefcik AyC – Analytische Chemie – 3. Jahrgang Activity 3: Listen to a presentation about TLC, take notes while listening and ask content-related questions, if necessary. DI. Bert Sefcik AyC – Analytische Chemie – 3. Jahrgang DI. Bert Sefcik AyC – Analytische Chemie – 3. Jahrgang Activity 4: Question loop You will receive a strip of paper with two statements: an answer on the left side and a question on the right side. Listen carefully to the first question asked by the teacher. If the answer on your strip fits to the question asked raise your hand and read the answer out loudly. Then you read out the question which is on the right side of the strip you got. Now somebody else has the correct answer. He/She raises his/her hand and reads it out loudly. Then loop continues. DI. Bert Sefcik AyC – Analytische Chemie – 3. Jahrgang Teacher’s version Thin Layer Chromatography (TLC) Activity 1: Read the text . Have a look at the list with TLC specific keywords to make sure that you understand what the text is about. DI. Bert Sefcik AyC – Analytische Chemie – 3. Jahrgang Activity 2: Complete the illustration below with the help of the text from activity 1. Then get in pairs and compare your results. DI. Bert Sefcik AyC – Analytische Chemie – 3. Jahrgang Activity 3: Listen to a presentation about TLC, take notes while listening and ask content-related questions, if necessary. DI. Bert Sefcik AyC – Analytische Chemie – 3. Jahrgang