AES Lower Sec Science Paper Chromatography Notes

ASSUMPTION ENGLISH SCHOOL SCIENCE DEPARTMENT Lower Secondary Science Chap 4 – Exploring Diversity of Matter Using Separation Techniques WS 4.4B – Paper Chromatography Name: ……………………………………. ( ) Class: ……… Date: ………… 1 Fill in the blanks in the boxes of a paper chromatography set-up. 2 What is the use/purpose of paper chromatography? To separate a _______________ into ________________________ 3 How can paper chromatography help to identify pure substances? ____________________________________________________________ 4 What property must the ink spots have to be investigated using paper chromatography? ____________________________________________________________ 5 Why should the start line be written in pencil instead of a pen? ____________________________________________________________ Assessing my Learning No Criterion Attainment Level 1 Attainment Level 2 Attainment Level 3 Attainment Level 4 Level Achieved 1 I am able to label all parts of a paper chromatography. 1 to 3 blanks 4 to 5 blanks 6 to 7 blanks 8 blanks 2,3, 4,5 I understand the uses of paper chromatography. 1 Overall Attainment Level: _______ Substance which is ______ soluble. Substance which is _______ soluble This study source was downloaded by 100000857398866 from CourseHero.com on 12-02-2024 23:29:57 GMT -06:00 https://www.coursehero.com/file/232137394/17-WS-44B-Paper-Chromatographydocx/

6 A student carried out paper chromatography on some samples of food colouring samples, A, B and C. The results are compared with approved brown, red and yellow dyes. The result of the chromatogram is shown below. (a) Which of the samples A, B or C, is a pure substance? Explain your answer. ________________________________________________________________ (b) Suggest a reason why sample B does not separate into its components. ________________________________________________________________ (c) Sample C separates into two components which overlap in the chromatogram. Suggest what can be done to ensure that the components are well-separated. ________________________________________________________________ (d) Which approved dye is present in Sample A? ________________________________________________________________ (e) Which dye, red or yellow, is more soluble in the solvent? Explain your answer. ________________________________________________________________ Assessing my Learning No Criterion Attainment Level 1 Attainment Level 2 Attainment Level 3 Attainment Level 4 Level Achieved 6 I am able to interpret paper chromatography. 1 to 2 parts 3 parts 4 parts All 5 parts 2 This study source was downloaded by 100000857398866 from CourseHero.com on 12-02-2024 23:29:57 GMT -06:00 https://www.coursehero.com/file/232137394/17-WS-44B-Paper-Chromatographydocx/ Powered by TCPDF (www.tcpdf.org)