CHM2046 Exam 3 Questions and Answers 100% Solved | Graded A+

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


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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



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