UCI Chem 1LD Practical Exam Newest 2026
Questions and Correct Detailed Answers Already
Graded A+
what is the major underlying principle of chromatography? - CORRECT
ANSWER-separation will be achieved if one component adheres to the
stationary phase more than the other component does
what is a stationary phase? - CORRECT ANSWER-Where the molecules can't
move. It is a solid or a really thick liquid
what is a mobile phase - CORRECT ANSWER-Where the molecules can move.
This is always a liquid or a gas
Why does most of the TLC plate turn pink? - CORRECT ANSWER-unreacted
permanganate is pink
Why does TLC spots turn yellow? - CORRECT ANSWER-the compound has
double bonds
What is true about gloves? - CORRECT ANSWER-1. gloves should not be
removed when they come in contact with hazardous chemicals
, 2. no glove material protects against all chemicals
What factors determines whether a solute will dissolve in a solvent? - CORRECT
ANSWER-imf's, molecular dipoles, molecular geometry, electrostatic attraction
What is the strongest imf that must be overcome when melting menthol? -
CORRECT ANSWER-hydrogen bonding
A solution is created when a small amount of solute dissolves in a large amount of
_________ - CORRECT ANSWER-solvent
What is concentration of a solvent reported as? - CORRECT ANSWER-molality
A solutions concentration is reported as _______ per ________ - CORRECT
ANSWER-solute per kilogram
What should you do to respond to an emergency? - CORRECT ANSWER-know
where the stairwells are, all laboratories must have two exits, stay calm, turn off
lab equipment before leaving lab for a fire alarm
Questions and Correct Detailed Answers Already
Graded A+
what is the major underlying principle of chromatography? - CORRECT
ANSWER-separation will be achieved if one component adheres to the
stationary phase more than the other component does
what is a stationary phase? - CORRECT ANSWER-Where the molecules can't
move. It is a solid or a really thick liquid
what is a mobile phase - CORRECT ANSWER-Where the molecules can move.
This is always a liquid or a gas
Why does most of the TLC plate turn pink? - CORRECT ANSWER-unreacted
permanganate is pink
Why does TLC spots turn yellow? - CORRECT ANSWER-the compound has
double bonds
What is true about gloves? - CORRECT ANSWER-1. gloves should not be
removed when they come in contact with hazardous chemicals
, 2. no glove material protects against all chemicals
What factors determines whether a solute will dissolve in a solvent? - CORRECT
ANSWER-imf's, molecular dipoles, molecular geometry, electrostatic attraction
What is the strongest imf that must be overcome when melting menthol? -
CORRECT ANSWER-hydrogen bonding
A solution is created when a small amount of solute dissolves in a large amount of
_________ - CORRECT ANSWER-solvent
What is concentration of a solvent reported as? - CORRECT ANSWER-molality
A solutions concentration is reported as _______ per ________ - CORRECT
ANSWER-solute per kilogram
What should you do to respond to an emergency? - CORRECT ANSWER-know
where the stairwells are, all laboratories must have two exits, stay calm, turn off
lab equipment before leaving lab for a fire alarm
