Chemistry 0620 · IGCSE · The characteristic properties of acids and bases

The characteristic properties of acids and bases — practice question

An excess of hydrochloric acid is introduced into aqueous sodium hydroxide that contains thymolphthalein. Which colour change is seen?

  • Ablue to colourless
  • Bcolourless to blue
  • Cred to yellow
  • Dyellow to red

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