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The graph represents the change in pH in the reaction flask when A - VCE - SSCE Chemistry - Question 1 - 2010 - Paper 1
Question 1
The graph represents the change in pH in the reaction flask when A. a weak acid is added to a strong base. B. a weak base is added to a strong acid. C. a strong acid... show full transcript
Worked Solution & Example Answer:The graph represents the change in pH in the reaction flask when A - VCE - SSCE Chemistry - Question 1 - 2010 - Paper 1
Step 1
C. a strong acid is added to a weak base.
Answer
When a strong acid is added to a weak base, the change in pH is more pronounced. This is because the strong acid dissociates completely, resulting in a rapid increase in hydrogen ion concentration. The weak base, on the other hand, does not fully dissociate, which causes a significant drop in pH as the acid reacts with the base. As a result, the graph is expected to show a steep drop in pH, indicative of this strong acid-weak base reaction.