| Date | May 2012 | Marks available | 1 | Reference code | 12M.1.hl.TZ2.24 |
| Level | HL | Paper | 1 | Time zone | TZ2 |
| Command term | Question number | 24 | Adapted from | N/A |
Question
Four aqueous solutions are listed below.
W. \({\text{0.100 mol}}\,{\text{d}}{{\text{m}}^{ - 3}}{\text{ HN}}{{\text{O}}_{\text{3}}}{\text{(aq)}}\)
X. \({\text{0.001 mol}}\,{\text{d}}{{\text{m}}^{ - 3}}{\text{ HN}}{{\text{O}}_{\text{3}}}{\text{(aq)}}\)
Y. \({\text{0.100 mol}}\,{\text{d}}{{\text{m}}^{ - 3}}{\text{ KOH(aq)}}\)
Z. \({\text{0.001 mol}}\,{\text{d}}{{\text{m}}^{ - 3}}{\text{ KOH(aq)}}\)
What is the correct order of increasing pH of these solutions?
A. \({\text{W}} < {\text{X}} < {\text{Y}} < {\text{Z}}\)
B. \({\text{W}} < {\text{X}} < {\text{Z}} < {\text{Y}}\)
C. \({\text{X}} < {\text{W}} < {\text{Y}} < {\text{Z}}\)
D. \({\text{X}} < {\text{W}} < {\text{Z}} < {\text{Y}}\)
Markscheme
B
Examiners report
[N/A]
Syllabus sections
Additional higher level (AHL) » Topic 18: Acids and bases » 18.2 Calculations involving acids and bases
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