20 Questions
Which theory defines an acid as a substance that liberates hydrogen ions and a base as a substance that supplies hydroxyl ions on dissociation in aqueous media?
Arrhenius theory
According to the Bronsted-Lowry theory, what is an acid?
A substance that donates a proton
In which solvent is HCI considered a weak acid?
Glacial acetic acid
Which theory defines an acid as a molecule or an ion that accepts an electron pair to form a covalent bond?
Lewis Electronic Theory
Which of the following is classified as a Lewis base according to the Lewis definition?
Amines
What type of bond is formed when a Lewis acid accepts an electron pair from a Lewis base?
Covalent bond
Which of the following can be classified as a Lewis base?
Ammonia (NH3)
What is the role of an acid according to the Arrhenius theory?
Liberates hydrogen ions
Which type of solvent is capable of accepting protons from the solute?
Protophilic solvent
Which type of solvent is a proton-donating compound?
Protogenic solvent
Which class of solvents act as both proton acceptors and proton donors?
Amphiprotic solvents
Which type of solvents neither accept nor donate protons?
Aprotic solvents
What is the pH value representing the neutral point?
7 at room temperature
What is the term for the autoprotolysis constant or ion product of water?
Ionic equilibria Kw
What is the pH at which zwitterion concentration is at its maximum?
IEP (Isoelectric point)
What is the net charge of a molecule at its Isoelectric point (IEP)?
-1
What is the charge of a molecule at pH above its Isoelectric point (IEP)?
+1
What is the charge of a molecule at pH below its Isoelectric point (IEP)?
-2
In the measurement of pH, what happens with a strong acid concentration?
Concentration of H is equal to initial concentration of acid.
In solutions containing a single conjugate acid-base pair, what example illustrates the measurement of pH?
Example 7-16 and 17
This quiz covers the study of ionic equilibria in physical pharmacy, including acid-base theories, calculation of pH, and acidity constants. It explores the Arrhenius and Bronsted-Lowry theories of acids and bases.
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