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This lesson covers AQA Required Practical 2 (Chemistry) — carrying out a titration to determine the reacting volumes of an acid and an alkali, as specified in the AQA GCSE Combined Science Trilogy specification (8464).
To find the exact volume of acid needed to neutralise a known volume of alkali using a titration technique with an indicator.
| Item | Purpose |
|---|---|
| Burette (50 cm³) | To add the acid gradually and measure the volume used precisely |
| Pipette (25 cm³) and pipette filler | To measure an exact volume of alkali |
| Conical flask (250 cm³) | To hold the alkali and indicator |
| White tile | To see the colour change clearly |
| Indicator (phenolphthalein or methyl orange) | To show the end point of the reaction |
| Dilute hydrochloric acid | The acid titrant |
| Sodium hydroxide solution | The alkali (analyte) |
| Clamp stand and boss | To support the burette |
| Funnel | To fill the burette |
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