Prepare a buret with a standardized NaOH solution.

First, rinse the buret with two small volumes $(5-10mL)$ of NaOH.

Dispose the buret rinse down the drain with excess water.

Next, fill the buret with the NaOH.

What is concentration of the standardized concentration of NaOH that is now in the buret?

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Hint: Use the averaged NaOH concentration.

$4.$ Refill the burette with NaOH if needed.

Record the initial volume of NaOH below.