To find out how much dilute hydrochloric acid (HCI) is needed to neutralise 25mls of sodium hydroxide solution (NaOH).

 Diagram of Apparatus:

Method:

1. Set up apparatus as shown in the diagram.

2. Dispense some hydrochloric acid in a beaker and then pour it into the burette, using a small funnel. (Making sure you pour it up to exactly 0)

3. Get 25ml of Sodium hydroxide and pour it into the conical flask.

4. Add a few drops of Universal Indicator liquid to the sodium hydroxide.

5. Place the thermometer into the conical flask.

6. Now your ready to start the experiment. Open the burette so 2cms of the liquid pours into the conical flask. Shake the conical flask to mix the solution record it’s colour, pH and temperature.

7. Keep doing this process in steps of 2cm until you reach you reach about 18cm. Then

start letting out the hydrochloric solution in 1cms. And as the solution is near to turning green (Neutral) let the solution out in shorter measurements (i.e. 0.5cm)

8. Record the results and then repeat the whole process twice more.