Photo AI
Which titration curve best represents the change in pH as 0.100 M NaOH solution is added to a 10.0 mL aliquot of 100 M HCl solution? A - VCE - SSCE Chemistry - Question 17 - 2012 - Paper 1
Question 17
Which titration curve best represents the change in pH as 0.100 M NaOH solution is added to a 10.0 mL aliquot of 100 M HCl solution? A. B. C. D.
Worked Solution & Example Answer:Which titration curve best represents the change in pH as 0.100 M NaOH solution is added to a 10.0 mL aliquot of 100 M HCl solution? A - VCE - SSCE Chemistry - Question 17 - 2012 - Paper 1
Step 1
Identify the expected titration curve
Answer
The titration of a strong acid (HCl) with a strong base (NaOH) typically shows a sharp increase in pH at the equivalence point. Initially, the pH remains low as the strong acid reacts with the base, but once enough base is added, the pH rapidly increases, indicating a neutralization reaction.
Step 2
Analyze each provided option
Answer
In this situation, we can analyze the graph options:
- Graph A shows only a slight change in pH, which is not typical for a strong acid-strong base titration.
- Graph B indicates an increase in pH but follows a more gradual slope than would be expected.
- Graph C displays a similar trend as Graph A and is also incorrect.
- Graph D, however, displays a sharp rise around the equivalence point and aligns well with what we would expect from this titration. Thus, the correct choice is Graph D.