Exothermic dissolution – use a borosilicate beaker in a water bath, PPE, and ventilation. See NaOH safety. Standardise against a primary standard if analytical accuracy is required.

Steps

Put ~800 ml cold demineralised water in a heat-safe beaker.
Slowly add 40 g NaOH with stirring; cool as needed.
Transfer to a 1 L volumetric flask and make up to mark when cool.
Label with concentration, date, and hazard.

Makes 1 L Time 20 minutes Level Intermediate

Materials required

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Sodium Hydroxide Pellets 40 g

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Demineralised Water to 1 L

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Always read the SDS and follow our chemical safety guidance before handling any chemical.

Preparing 1M Sodium Hydroxide Solution

Steps

Materials required

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