Which of the following best represents the pH of the solution at the equivalence point and the name of a suitable indicator for this titration?
| pH at the equivalence point | suitable indicator |
|-----------------------------|-------------------|
| A - VCE - SSCE Chemistry - Question 9 - 2009 - Paper 1
Question 9
Which of the following best represents the pH of the solution at the equivalence point and the name of a suitable indicator for this titration?
| pH at the equivale... show full transcript
Worked Solution & Example Answer:Which of the following best represents the pH of the solution at the equivalence point and the name of a suitable indicator for this titration?
| pH at the equivalence point | suitable indicator |
|-----------------------------|-------------------|
| A - VCE - SSCE Chemistry - Question 9 - 2009 - Paper 1
Step 1
pH at the equivalence point
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Answer
At the equivalence point of a strong acid-strong base titration, the pH of the solution is typically around 7. However, in other types of titrations (e.g., weak acid with strong base), this value can be greater than 7.
Step 2
suitable indicator
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Answer
In the case of titration involving a strong acid and a strong base, the appropriate indicator is bromophenol blue, which changes color at pH values above 7, thus effectively indicating the equivalence point.
