CHEM 1B
Dr. R. Rinehart

 

QUIZ 3  Description revised 7/17/09 

READ THIS GENERAL STATEMENT CAREFULLY:

            Your mission in this course is to obtain for yourself a useful working knowledge and understanding, at an appropriate level, of selected topics in general chemistry, as elaborated in your text and in class. The resources available to you include: the text, lectures and class handouts posted on this site, laboratory exercises, references in print and on the internet, consultation with the instructor outside of class, tutors, study groups, and whatever other legitimate means are necessary. There is no easy path to success. Put the work in.  It is particularly important to pay attention to the following:   chapter  summary,  key terms and concepts, and the assigned problems.  You will not be able to demonstrate adequate mastery of the material unless you understand the principles involved!  Similarly, you will find it pointless to memorize key terms without knowing what they mean and how they can be applied.

 “Right, sure, yeah, yeah, yeah – just tell us what’s going to be on the test, doc.”

What?  Questions designed to show if you have learned to use these principles and their associated language.

How?   Generally by means of objective questions in a variety of formats: fill-ins, short answers, matching, multiple choice, true-false, listing, categorizing, prioritizing, and problem-solving, drawing and/or interpreting diagrams, writing (and sometimes balancing) equations, completing tables, and making rational deductions are all highly probable possibilities.

With that in mind, a brief description of what you can expect follows:
 

points

Subjects from Ch 16 covered [in my own inimitable range of styles]
44

vocabulary:  I define, you give the term 
[16 -- acids and bases]
38

assorted problems and calculations
 -- see below
48

predicting behavior of acids, bases, and salts -- see below
24

relationship of structure/composition to acid/base strength

Did you fill out the pKa table yet???? [duh!]
166 grand total --- but it's all on one side of the sheet ;-)
  STUFF SHADED IN RED BELOW WILL NOT BE ON THIS QUIZ!!!!

CHEM 1B  Dr. R. Rinehart
ACIDS and BASES
PROBLEM PROTOTYPES

NOTE: Quiz 3 will also contain definitions and other types of questions in addition to problems!

 

►. A weak acid (or weak base) is found to be ____% dissociated at a pH (pOH) of _____.
●Calculate its Ka  <or pKa> (Kb or pKb)

 

►.  ___ moles of a specified salt [made up of what should be familiar ions, [Ka or pKa  (Kb or pKb)  will be given] is dissolved in enough water to make ____ mL of solution.
●Is the resulting solution acidic or basic?
●Calculate its pH.

 

►.    ___ moles of specified weak acid or weak base [Ka or pKa  (Kb or pKb)  will be given] will be given] is dissolved in enough water to make ____ mL of solution.
●Calculate its pH. 

 

►.  A salt, hydrated metal ion, or metal hydroxide [any of which may perhaps be identified by its name, in which case you MAY be expected to write its formula] is dissolved in water.
●Is the resultant solution acidic or basic?

 

►.  ●Arrange a series of compounds in order of increasing [or decreasing] acidity [or basicity].
●Explain the reasoning used.

 

►. A ___ M solution of a weak acid [or weak base] has a pH of _____.
 ●Calculate its Ka or pKa  (Kb or pKb) .

 

►.  A buffer solution is made up by dissolving  ___ moles of specified weak acid or weak base and
___ moles of its salt [made with a strong acid or base] in enough water to make ____ mL of solution.
[Ka  or pKa (Kb or pKb) will be given]. Calculate its pH. Calculate its pH after the addition of ____ mL of ____ M [strong acid or strong base] <or after the addition of ___ mol of  H3O+ or OH->     This kind of stuff will be on EXAM 3