acids alkalis and titrations

• • Titrations are a method of analysing the concentration of solutions
• • Acid-base titrations are one of the most important kinds of titrations
• Why is the conical flask placed on a white tile?

  To better observe the color change
• What should be added to the sodium hydroxide solution in the conical flask?

  A few drops of a suitable indicator
• What is the purpose of performing a rough titration?

  To estimate the end-point volume quickly
• How should the solution be added during the rough titration?

  In 1 – 3 cm³ portions while swirling
• What indicates that the end-point has been reached during titration?

  A sharp colour change
• What should be done after reaching the end-point in the rough titration?

  Record the volume at eye level with the meniscus
• What should be done with the sodium hydroxide solution for the next titration?

  Use a fresh batch of sodium hydroxide
• How should the solution be added as the end-point volume is approached?

  One drop at a time until colour change
• To what precision should the volume be recorded during titration?

  To the nearest 0.05 cm³
• What are concordant results in titration?

  Two results within 0.1 cm³ of each other
• Why is it important to achieve concordant results in titration?

  To increase accuracy of the titration