DP Chemistry (first assessment 2025)
Question 21N.1A.HL.TZ0.26
Date | November 2021 | Marks available | [Maximum mark: 1] | Reference code | 21N.1A.HL.TZ0.26 |
Level | HL | Paper | 1A | Time zone | TZ0 |
Command term | State | Question number | 26 | Adapted from | N/A |
26.
[Maximum mark: 1]
21N.1A.HL.TZ0.26
What is a possible value of pH at the equivalence point in the titration of a strong acid with a weak base?
A. 5
B. 7
C. 9
D. 11
[1]
Markscheme
A
Syllabus sections
Reactivity 3. What are the mechanisms of chemical change? » Reactivity 3.1—Proton transfer reactions » Reactivity 3.1.13—pH curves of different combinations of strong and weak monoprotic acids and bases have characteristic shapes and features. Interpret the general shapes of pH curves for all four combinations of strong and weak acids and bases.