Chemistry Exam Worksheets With Answers - Chemistry 11, Exam Ii - 2006 Page 10
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12V Baker’s Street Dozen Lab (16 points)
You have signed up to be a TA next semester, and Professor Sanborn gives you the answer key to the
Baker’s Street Half-Dozen lab. The six solutions are labeled in lab only as A-F. Your answer key tells
you that A is silver nitrate, B is sodium chloride, C is sodium hydroxide, D is nitric acid, E is
hydrochloric acid, and F is sodium carbonate, and each is 0.1 M.
1. Write out the chemical formulas of the six solutions
AgNO
, NaCl, NaOH, HNO
, HCl , Na
CO
3
3
2
3
2. Predict the approximate pH of each solution.
~ 7,
~7,
~12,
~2,
~1,
~8
3. Fill out the reactivity chart so that you’ll be ready for your students. Record what your students
will observe i.e. “milky white precipitate or “bubbles formed.” Write “NR” if no reaction occurs.
B NaCl,
C NaOH
D HNO
E HCl
F Na
CO
3
2
3
A
White PPT
Brown PPT
NR
White PPT
Wh/Yellow PPT
B
NR
NR
NR
NR
C
Neutralization
Neutralization
NR
D
NR
Bubbles
E
Bubbles
Write out an explanation for how the identification is made for each unknown to help you explain to
your students.
A. Will react to form a precipitate with any solution having chloride in it.
B. Reacts only with A to form a precipitate.
C. Reacts only with A to form a brown precipitate.
D. Reacts only with F to form bubbles.
E. Reacts with A and forms bubbles with F.
F. Reacts with solutions having a low pH such as D and E. It also reacts with A.
Assorted Equations, Constants, and Conversion Factors
Wavelength, frequency, speed relation for waves:
= c
hc
Photon energy:
E
h
photon
Photoelectric effect:
E
E
h
h
photon
o
–
kinetic (ejected e
)
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