03 0620 52 4RP - Amazon Web Services...Notes for use in qualitative analysis are provided on pages 7 and 8. At the end of the examination, fasten all your work securely together. The
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READ THESE INSTRUCTIONS FIRST
Write your centre number, candidate number and name on all the work you hand in.Write in dark blue or black pen.You may use an HB pencil for any diagrams or graphs.Do not use staples, paper clips, glue or correction fluid.DO NOT WRITE IN ANY BARCODES.
Answer all questions.Electronic calculators may be used.You may lose marks if you do not show your working or if you do not use appropriate units.Notes for use in qualitative analysis are provided on pages 7 and 8.
At the end of the examination, fasten all your work securely together.The number of marks is given in brackets [ ] at the end of each question or part question.
CHEMISTRY 0620/52Paper 5 Practical Test February/March 2019
1 hour 15 minutes
Candidates answer on the Question Paper.
Additional Materials: As listed in the Confidential Instructions
Cambridge Assessment International EducationCambridge International General Certificate of Secondary Education
1 You are going to investigate the reaction between two different solutions, A and B, of aqueous potassium manganate(VII) and solution C.
Read all the instructions carefully before starting the experiments.
Instructions You are going to do three experiments.
(a) Experiment 1
● Fill the burette up to the 0.0 cm3 mark with solution A. ● Use the 25 cm3 measuring cylinder to pour 25 cm3 of solution C into the conical flask. ● Add about 1 cm3 of solution A to the conical flask and swirl the conical flask. ● Continue to add solution A to the conical flask until the mixture just turns permanently pink. ● Record the burette readings in the table and complete the table. ● Pour about 2 cm3 of the contents of the conical flask into a test-tube. ● Pour away the rest of the contents of the conical flask and rinse the conical flask with
distilled water.
Keep the test-tube from Experiment 1 to use in Experiment 3.
Experiment 1
final burette reading / cm3
initial burette reading / cm3
volume used / cm3
[2]
(b) Experiment 2
● Pour away the contents of the burette and rinse the burette with distilled water. ● Rinse the burette with solution B. ● Fill the burette up to the 0.0 cm3 mark with solution B. ● Use the 25 cm3 measuring cylinder to pour 25 cm3 of solution C into the conical flask. ● Add about 1 cm3 of solution B to the conical flask and swirl the conical flask. ● Continue to add solution B to the conical flask until the mixture just turns permanently pink. ● Record the burette readings in the table and complete the table.
2 You are provided with two substances, solution D and solid E. Do the following tests on the substances, recording all of your observations at each stage.
tests on solution D
Divide solution D into five approximately equal portions in five test-tubes.
(a) Test the pH of the first portion of solution D.
pH = .............................. [1]
(b) Add a strip of magnesium ribbon to the second portion of solution D. Shake the mixture. Test the gas produced.
(f) (i) Use a spatula to place half of solid E into a hard-glass test-tube. Heat the solid gently and then more strongly. Leave the hard-glass test-tube to stand for five minutes to cool.
chlorine (Cl 2) bleaches damp litmus paper potassium (K+) lilac
hydrogen (H2) ‘pops’ with a lighted splint copper(II) (Cu2+) blue-green
oxygen (O2) relights a glowing splint
sulfur dioxide (SO2) turns acidified aqueous potassium manganate(VII) from purple to colourless
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