CHM2046 Exam 3 Questions and
Answers 100% Solved | Graded A+
A ____________ is a solution that resists pH change by neutralizing the
added acid or base. - ✔✔buffer
A ____________ contains significant amounts of either a weak acid/base
and its conjugate base/acid. - ✔✔buffer
A ______________ neutralizes small to moderate amounts of added acid
or base without a large change in its pH. - ✔✔buffer
pH = pKa + log[base/acid] - ✔✔Henderson-Hasselbalch equation
The __________________ equation relates the pH of a buffer solution to
the initial concentration of the buffer components. - ✔✔Henderson-
Hasselbalch equation
If OH- is added, the stoichiometric amount of the ______________ is
neutralized and converted to the ________________. - ✔✔weak acid;
conjugate base
1
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, If H3O+ is added, the stoichiometric amount of the ________________ is
neutralized and converted to the ________________________. -
✔✔conjugate base; weak acid
Adding an acid creates more ____________. - ✔✔acid
Adding a base creates more ____________. - ✔✔base
pKa + pKb = 14 - ✔✔
The base is in lower concentration than its conjugate acid if (B/A) is
___________. - ✔✔less than 1
The base is in higher concentration than its conjugate acid if (B/A) is
______________. - ✔✔larger than 1
A buffer is most effective when the concentrations of acid and conjugate
base are _____________. - ✔✔equal
When choosing an acid to make a buffer, choose one whose pKa is the
closest to the ____________ of the buffer. - ✔✔pH
A buffer is most effective when the concentrations of acid and conjugate
base are at their _____________ concentration. - ✔✔highest
2
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
Answers 100% Solved | Graded A+
A ____________ is a solution that resists pH change by neutralizing the
added acid or base. - ✔✔buffer
A ____________ contains significant amounts of either a weak acid/base
and its conjugate base/acid. - ✔✔buffer
A ______________ neutralizes small to moderate amounts of added acid
or base without a large change in its pH. - ✔✔buffer
pH = pKa + log[base/acid] - ✔✔Henderson-Hasselbalch equation
The __________________ equation relates the pH of a buffer solution to
the initial concentration of the buffer components. - ✔✔Henderson-
Hasselbalch equation
If OH- is added, the stoichiometric amount of the ______________ is
neutralized and converted to the ________________. - ✔✔weak acid;
conjugate base
1
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
, If H3O+ is added, the stoichiometric amount of the ________________ is
neutralized and converted to the ________________________. -
✔✔conjugate base; weak acid
Adding an acid creates more ____________. - ✔✔acid
Adding a base creates more ____________. - ✔✔base
pKa + pKb = 14 - ✔✔
The base is in lower concentration than its conjugate acid if (B/A) is
___________. - ✔✔less than 1
The base is in higher concentration than its conjugate acid if (B/A) is
______________. - ✔✔larger than 1
A buffer is most effective when the concentrations of acid and conjugate
base are _____________. - ✔✔equal
When choosing an acid to make a buffer, choose one whose pKa is the
closest to the ____________ of the buffer. - ✔✔pH
A buffer is most effective when the concentrations of acid and conjugate
base are at their _____________ concentration. - ✔✔highest
2
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
