Sample Test 1

Analysis of solid D

Test Procedure

You are provided with solid D. Carry out the tests below and write down your observations and inferences in the spaces provided.

  • (a) Using a metallic spatula, burn about one third of solid D on a non-luminous flame
  • (b) Place the remaining solid D in a clean boiling tube and add about 10cm3 of distilled water.
  • (c) Divide the resulting solution into 3 portions T1, T2 & T3.
    • (i) To the 1st portion, add all the solid hydrogen carbonate provided
    • (ii) To the 2nd portion, add 2 to 3 drops of acidified potassium dichromate (VI) solution and warm
    • (iv) To the 3rd portion, add 2 to 3 drops of acidified potassium manganate (vii) solution.

Tips: Follow the procedure sequentially and the sytem monitor instructions.
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Workbench

VIRTUAL WORKBENCH MONITOR Selected: None
System Initialised. Select boiling tube to start step 1.
B.T
T1
T2
T3

STUDENT LABORATORY WORKBOOK

Procedure Observations Inferences
Using a metallic spatula + burning about one third of solid D in a non-luminous flame
(b) Placed the remaining solid D in a clean boiling tube + about 10cm3 of distilled water.
(c) Divided the resulting solution into 3 portions T1, T2 & T3.
(i) 1st portion + all the solid hydrogen carbonate provided
(ii) 2nd portion + 2 to 3 drops of acidified K2CR207 solution + warmed
(iv) 3rd portion + 2 to 3 drops of acidified KMNO4 solution.