AP CHEMISTRY UNIT 3 REVIEW
Flashcard
•
Chemistry
•
11th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What does a higher Rf value in chromatography indicate about a substance's solubility and adsorption?
Back
A higher Rf value indicates that the substance is less strongly adsorbed onto the stationary phase and more soluble in the mobile phase.
2.
FLASHCARD QUESTION
Front
Which compound has the highest boiling point: NH3, CH4, or H2O?
Back
NH3 has the highest boiling point due to hydrogen bonding.
3.
FLASHCARD QUESTION
Front
What type of compounds generally have the highest solubility in water?
Back
Ionic compounds generally have the highest solubility in water.
4.
FLASHCARD QUESTION
Front
Which molecule is the most polar: HCl, HF, or CH4?
Back
HF is the most polar molecule due to the high electronegativity difference between H and F.
5.
FLASHCARD QUESTION
Front
What property of elements on the periodic table is important for determining intermolecular forces?
Back
Electronegativity is important for determining intermolecular forces.
6.
FLASHCARD QUESTION
Front
What is the significance of the Rf value in chromatography?
Back
The Rf value indicates the relative distance traveled by a compound compared to the solvent front, reflecting its solubility and interaction with the stationary phase.
7.
FLASHCARD QUESTION
Front
How does hydrogen bonding affect the boiling point of a substance?
Back
Hydrogen bonding increases the boiling point of a substance due to the strong attractive forces between molecules.
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