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Worksheet: Titration Indicators

Q1:

Phenolphthalein is used to detect the end point of an acid-base reaction. At which of the following pH values is the equivalence point likely to be detected?

  • A7
  • B11
  • C5
  • D9
  • E3

Q2:

Litmus is used to detect the end point of an acid-base reaction. At which of the following pH values is the equivalence point likely to be detected?

  • A4
  • B2
  • C9
  • D7
  • E11

Q3:

A titration is performed with a basic titrant and acidic analyte. Which of the following colour changes could be observed at the equivalence point?

  • ALitmus changes from blue to red.
  • BMethyl orange changes from yellow to red.
  • CBromothymol blue changes from blue to yellow.
  • DPhenolphthalein changes from colourless to pink.
  • EMethyl violet changes from violet to yellow.

Q4:

Methyl orange is used to detect the end point of an acid-base reaction. At which of the following pH values is the equivalence point likely to be detected?

  • A6
  • B2
  • C8
  • D4
  • E10