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Chemistry - Titrations

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This is one of those titration labs, maybe you could answer it?
Why must a buret be rinsed with NaOH solution before it is filled and not water?

Note: ( Buret will be full of NaOH )

  • Chemistry - Titrations -

    Distill water has pH = 7 and NaOH is a strong base (pH > 7)... if you mix NaOH with water, it will neutralize some of the base (decrease the pH to be closer to 7) and thus contaminate the NaOH solution.

  • Chemistry - Titrations -

    If you rinse with water it dilutes the NaOH that you add later and that isn't what you want.

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