Rinsing with distilled water is important to remove dirt from the burette. The burette should be rinsed with a titrant to remove any distilled water that may be present and to prevent the solution in the burette from being diluted.
Why did you rinse the burette with the base before filling it with sodium hydroxide?
The base flash ensures that NaOH is not accidentally neutralized by unwanted acidic chemical residues in the burette. This will change the NaOH concentration and cause a calculation error.
Next, you need to pour 10-15 ml of the solution into a clean, dry beaker and rinse 3 times with a titrant by transferring a few milliliters to the burette after every 3 rinses using a funnel. This rinse ensures that there is no residual water left to dilute the titrant when the burette is filled.
Learn more about titration here: https://brainly.com/question/186765
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