Acids and Bases
Given a buffered solution comprising weak acid HA and strong base BOH, what would be the result of a doubling in salt AB concentration formed from the reaction between HA and BOH on its pH, presently seven?
The pH will oscillate before eventually settling back at the seven mark.
The pH will remain unaffected as the buffer system adjusts to preserve the initial condition.
The pH will decrease significantly since the concentration of free H+ is diminished.
The pH will increase slightly but remain close to seven.
In determining whether an unknown salt XY will precipitate when mixed with solution Z containing ions X^+ Y^- Z^-, what piece of information about XY could best predict precipitation?
The value of Ksp for XY compared to ion concentrations in solution Z
Phase change energy requirements for solid XY versus Z^-
The absolute electronegativity difference between X^+ Y^-.
Temperature stability range for XY crystal lattice.
Which research question would most effectively determine how different solvents influence acid dissociation constants for a given organic acid?
How do solvent polarity and hydrogen bonding capacity affect the value of pKa for acetic acid in different solvent environments?
What is the relationship between buffer capacity and concentration for solutions with comparable pKa values?
How will altering ambient pressure conditions alter pH levels in standard aqueous solutions of hydrochloric acid?
Does changing the stoichiometry ratio between acids and bases modify the endpoint of an acid-base titration reaction?
When do we get the strongest buffer according to Henderson-Hasselbalch Equation?
When concentration of [A-] is double than [HA]
When concentration of [HA] is twice than[A-]
When concentrations of both are zero.
When concentration of [A-] equals to [HA]
What term describes the number and kinds of atoms present in a molecule?
Atomic structure
Empirical formula
Structural formula
Molecular formula
Which of the following pairs will create the best buffer with a pH less than neutral?
NH3-NH4Cl
HCl-NH4Cl
NaOH-NaCl
HF-KF
If a molecule has a high boiling point, what intermolecular force must be most prevalent in this substance?
Hydrogen bonding
London dispersion forces
Ionic bonding
Dipole-dipole interactions

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In an experiment determining activation energy via temperature variation for an endothermic reaction with established equilibrium, what would be indicative of a higher activation energy for the forward reaction compared to reverse?
Large increase in K when temperature increases
Large decrease in K when temperature decreases
Small decrease in K when temperature increases
No change in K when temperature increases
If a substance has a pKa of 4, at what pH will it be half deprotonated?
At pH 2.
At pH 6.
At pH 4.
At pH 8.
What happens to the pH level of a solution when an acid is added?
It remains constant.
It decreases.
It fluctuates unpredictably.
It increases.