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Date May 2009 Marks available 1 Reference code 09M.1.sl.TZ1.23
Level SL Paper 1 Time zone TZ1
Command term Deduce Question number 23 Adapted from N/A

Question

When equal volumes of four \({\text{0.1 mol}}\,{\text{d}}{{\text{m}}^{ - 3}}\) solutions are arranged in order of increasing pH (lowest pH first), what is the correct order?

A.     \({\text{C}}{{\text{H}}_{\text{3}}}{\text{COOH}} < {\text{HN}}{{\text{O}}_{\text{3}}} < {\text{C}}{{\text{H}}_{\text{3}}}{\text{C}}{{\text{H}}_{\text{2}}}{\text{N}}{{\text{H}}_{\text{2}}} < {\text{KOH}}\)

B.     \({\text{HN}}{{\text{O}}_{\text{3}}} < {\text{C}}{{\text{H}}_{\text{3}}}{\text{COOH}} < {\text{C}}{{\text{H}}_{\text{3}}}{\text{C}}{{\text{H}}_{\text{2}}}{\text{N}}{{\text{H}}_{\text{2}}} < {\text{KOH}}\)

C.     \({\text{C}}{{\text{H}}_{\text{3}}}{\text{C}}{{\text{H}}_{\text{2}}}{\text{N}}{{\text{H}}_{\text{2}}} < {\text{HN}}{{\text{O}}_{\text{3}}} < {\text{C}}{{\text{H}}_{\text{3}}}{\text{COOH}} < {\text{KOH}}\)

D.     \({\text{KOH}} < {\text{C}}{{\text{H}}_{\text{3}}}{\text{C}}{{\text{H}}_{\text{2}}}{\text{N}}{{\text{H}}_{\text{2}}} < {\text{C}}{{\text{H}}_{\text{3}}}{\text{COOH}} < {\text{HN}}{{\text{O}}_{\text{3}}}\)

Markscheme

B

Examiners report

[N/A]

Syllabus sections

Core » Topic 8: Acids and bases » 8.4 Strong and weak acids and bases
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