IB myp 4-5 Chemistry – Practice Questions- All Topics
Topic :Pure and impure substances–chromatography
Topic :Pure and impure substances- Weightage : 21 %
All Questions for Topic : types of mixtures [solutions, oils, alloys, emulsions],separation techniques including: filtration, distillation [including
crude oil],chromatography
Question:
Identify the ions present in Sample 2.
▶️Answer/Explanation
Ans: The metal ions cobalt Co2+ and mercury Hg2+ are present in sample 2.
Question:
Identify the ions present in Sample 3.
▶️Answer/Explanation
Ans: The metal ions nickel Ni2+, cadmium Cd2+ and mercury Hg2+ are present in sample 3.
Question:
Analyze the data and list the ions in the first table from the fastest to the slowest.
▶️Answer/Explanation
Ans: Ni2+, Co2+, Cu2+, Cd2+, Hg2+.
Question:
Sketch the appearance of the chromatography paper of sample 1 after the analysis has been completed.
▶️Answer/Explanation
Ans: The sketch should include a rectangular piece of chromatography paper, with a blue dot positioned 6 cm from the baseline and a yellow dot positioned 7.8 cm from the baseline.