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Determine the reacting volumes of solutions of acid and alkali by titration and determine the concentration of solutions of acid and alkali by titration

In this experiment you will use the titration technique to determine the concentration of the provided sodium hydroxide solution. The process of carrying out a titration allows us to accurately measure the volumes of an acid and an alkali required for neutralisation. An indicator will be used to determine the exact volume required for neutralisation.

In order to carry out this practical you will be using two pieces of volumetric apparatus, the pipette and burette. You will also be carrying out the technique of titrating. All these skills require careful understanding and practice in order to ensure that the measurements are as accurate as possible.

Apparatus and chemicals

• Sodium hydroxide solution 100 cm³ (approx. concentration 8.0 g/dm³ – technician- make a note of the exact concentration made up)
• 0.1 mol/dm³ sulfuric acid, H₂SO₄ 100 cm³
• Phenolphthalein indicator
• 25.0 cm³ pipette and filler
• 50.0 cm³ burette, retort stand and burette clamp
• Small funnel
• 250 cm³ Conical flask (x3)
• Distilled Water
• White tile