A student carries out a titration to find the concentration of a sample of dilute hydrochloric acid. The student: - adds $$\(25.0 \mathrm{~cm}^{3}\)$$ of aqueous potassium hydroxide to the apparatus labelled $$\(\mathbf{A}\)$$ in Fig. 1.1 Fig. 1.1 - adds a few drops of a suitable indicator to the apparatus labelled $$\(\mathbf{A}\)$$ - uses a burette to add dilute hydrochloric acid to the aqueous potassium hydroxide and indicator mixture in the apparatus labelled $$\(\mathbf{A}\)$$. The student adds the indicator after the volume of the $$\(25.0 \mathrm{~cm}^{3}\)$$ of aqueous potassium hydroxide has been measured. (i) Explain why the student adds an indicator to the aqueous potassium hydroxide. ................................................................................................................................... (ii) Name a suitable indicator. ...................................................................................................................................

Answer:

Knowledge points:

Solution: