CHEM 120L EXAM: 2025/2026, WITH CORRECT/ACCURATE ANSWERS

CHEM 120L EXAM: 2025/2026, WITH
CORRECT/ACCURATE ANSWERS
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An acid that is diprotic must have: - CORRECT ANSWERS- two
titratable acidic protons



In chemistry, a solution that has been standardized has: -
CORRECT ANSWERS- an accurately determined concentration



What is the definition of a titrant solution used in titrations? -
CORRECT ANSWERS- the liquid dispensed from the burette



The indicator phenolphthalein is a weak organic acid whose
unprotonated form is: - CORRECT ANSWERS- pink / red



eluent - CORRECT ANSWERS- the sample that is being loaded
onto the ion exchange column



Eluate - CORRECT ANSWERS- The solution that washes out (e.g.,
solutions that drip from a chromatography column).



equivalence point - CORRECT ANSWERS- occurs when the moles
of acid equal the moles of base in a solution

, end point of titration - CORRECT ANSWERS- the point at which
the indicator changes color



primary standard - CORRECT ANSWERS- a highly purified solid
compound used to check the concentration of the known solution
in a titration



stationary phase - CORRECT ANSWERS- a solid, gel, or
immobilized liquid



chromatographic bed - CORRECT ANSWERS- a column or sheet
used to support the stationary phase



mobile phase of chromatography - CORRECT ANSWERS- solvent
which carries samples through the stationary phase



delivery system - CORRECT ANSWERS- a force that moves the
sample through the stationary phase (gravity or pressure)



detector - CORRECT ANSWERS- way to identify or quantify
substances as they elute



Elute - CORRECT ANSWERS- leave the stationary phase