The Use of a HCl/NaOH Titration to make NaCl Salt

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Equipment:

• Standard 0.1M hydrochloric acid solution
• Sodium hydroxide solution
• Methyl orange indicator
• Deionised water
• Burette
• Pipette and filler
• Retort and clamp
• Funnel
• Conical flask
• White tile
• Beakers
• Hot plate

Experiment:

1. Rinse conical flask, burette and pipette with deionised water
2. Rinse burette with HCl and pipette with NaOH
3. Pipette 25cm³ NaOH solution into conical flask and add a few drops methyl orange indicator
4. Fill burette to 0cm³ mark with HCl solution
5. Carry out one rough and two accurate titrations
6. Calculate concentration of NaOH solution.

To obtain salt sample:

1. Place 25cm³ NaOH solution in a beaker with no indicator
2. Using results from titration, add just enough HCl to exactly neutralise the NaOH
3. Gently heat solution on hot plate until water has evaporated
4. A salt sample will remain in the beaker