In the analysis of your commercial ammonia product, you used a dirty buret, and

Question

In the analysis of your commercial ammonia product, you used a dirty buret, and droplets of HCl
titrant stuck to the inside glass walls as the level of titrant went down during the titration, but you
wanted to get out of lab quick, so you went ahead and recorded the volumes and calculated your
NH4OH concentration as if things were fine. If you had taken the time to clean the buret first so that
the drops would not have stuck to the side walls of your buret and thereby done the titration properly,
the calculated NH4OH concentration would have been _____ (“higher than,” “lower than,” or
“the same as”) the value obtained with the dirty buret? Briefly explain how you arrived at this
conclusion.

Explanation / Answer

since drop stuck in the buret, the amount of titrant will be higher (needed vs. real)

therefore

the concnetration will be lower, since we will require more volume, therefore, same amount of mass in larger volume reduced concnetration

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