Video Transcript
Why should a buret always be filled
at eye level and never above? (A) To reduce the risk of splashing
acid or base onto the eyes or face. (B) To know when the beaker or
measuring cylinder is empty. (C) To make sure the solution is
poured into the buret and not on the floor. (D) To watch the solution move down
the buret. Or (E) to allow the buret to be
filled while sitting down.
A buret is a piece of glassware
used to deliver a volume of liquid. Burets are essential pieces of
glassware when performing acid–base titrations, an experiment carried out to
determine the concentration of a solution. When performing an acid–base
titration, the buret is filled with an acid or a base that has a known
concentration. Acids and bases are corrosive. They can irritate or burn eyes and
skin. If we were to fill a buret above
eye level, there is a greater risk of spilling or splashing the acid or base onto
our eyes or face, which are below the beaker. To reduce this risk, burets should
always be filled at eye level.
Looking at the answer choices, we
see that the answer choice that best explains why a buret should always be filled at
eye level and never above is answer choice (A), to reduce the risk of splashing acid
or base onto the eyes or face.
