Question: Why is important to stir the solution with HCl vigorously for 10 minutes while trying to determination of the Alkalinity of Seawater using a Gran

Why is important to stir the solution with HCl vigorously for 10 minutes while trying to determination of the Alkalinity of Seawater using a Gran Plot before continuing the titration? Why the fast rate and why do bubbles form on the probe?

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