This document provides information and instructions for students regarding an upcoming chemistry class. It lists materials needed including pencils, colored pencils, and assignments on acids and bases. It announces test corrections and retakes due the next day. It provides guidance for students to review mistakes on a past quiz. It also includes review questions on acids, bases, pH scale, and neutralizing acids safely.

1. Today in Chemistry
You will Need:
Pencil, Colored Pencil
Acids and Bases Parts 1 & 2
Should already have 4
pages 7 sides – Please staple
Test #3 Corrections &
Student Self Assessment –
Due Tomorrow up last week)

2. Test #3 Retakes
Test Corrections + Student
Assessment – Due
Tomorrow.
•Retakes offered Friday at
Lunch,
•Monday, April 30th before
school and at lunch
•Tuesday, May 1st before
school and at lunch

3. Quiz #4 – Review & Reflect
Look over the questions you
missed on Quiz #4– Why did
you miss them?
•Ask a table mate to clarify
•Did you misread the question?
•Where your mistakes careless?
•Do you need to review the
concept, vocabulary word,
formula, etc.?
STAR SCIENCE COMPONENT
tomorrow

4. A positively or negatively
ION: charged atom/molecule
pH Measures the # of H+ ions in a
solution (Potential Hydrogen Ions)
Scale:
ACID 7 BASE
0-6.9 NEUTRAL 7.1-14

5. • Shade the
center area of
your data
table with the
appropriate
color.

6. Base
Acid
Both

7. Word Bank:
base, pH,
salt, acid,
pH neutral

8. • Timer Designers – Log – on to
Learning Point and open up –
ACID and BASE Virtual Lab
• Turn to #6 Interactive Computer
Activity
Bromothymol Blue
in the presence of
ACID, NEUTRAL
and BASE

9. Visit the
• One of the pH Explore the pH Factor
paper colors option on the class
is wrong. website:
• Which one?
• Why?
• Highlight the
wrong row
with a colored
pencil. http://www.miamisci.org/p

10. 8. Bleach has a pH of about 13. If you
mix a solution of 50% bleach and
50% water, what would be true
about the pH of a the mixture?
• It would be less than 7
• It would be between 7 and 13
C. It would be greater than 13
D. There is not enough info to solve

11. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
Water Bleach
7
Neutral
H2O
Some of the Negative OH-
particles will diluted by
13 the Neutral particles of
More
OH-
the water.

12. 1.Suppose you have already compared the
pH values of two substance using 0-14 pH
paper. When would a follow-up test using
4.5-7.5 paper be most helpful?
• When both sub. had a pH value of about 3
on the 0-14 paper
• When both sub. had a pH value of about 6
on the 0-14 paper
• When both sub. had a pH value of about 9
on the 0-14 paper
• When on substance had a pH value of
about 5 and the other had a pH value
about 7 on the 0-14 paper.

13. New testing
strip range
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
Retest the
A B C solutions that
both have a “6”
as an answer to
show how they
D are different.
Which choice not only fits the requirements of
the new testing paper (4.5-7.5) but also needs
to show a difference between two solutions?

14. 10. Suppose you had needed to
neutralize a strong acid (pH2).
Describe 2 ways you could do this
safely.

15. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
Vinegar Equal
Lots of strength
Water Alkaline
Substance
Caution: You wouldn’t want to mix a
Lots of strong acid with a strong base….
OH- You would get a VERY exothermic
reaction, meaning that you now have a
Lots VERY HOT mixture of strong acid and
of H+
base.

16. 10. Suppose you had needed to
neutralize a strong acid (pH2).
Describe 2 ways you could do this
safely.
11. Explain how OH- values and H+
values determine Acids and Bases.

17. 10. Suppose you had needed to
neutralize a strong acid (pH2).
Describe 2 ways you could do this
safely.
11. Explain how OH- values and H+
values determine Acids and Bases.
• Why is it important to be careful
with the things that we put down the
drain or that we let evaporate into
our air? (3-4 sent.)

18. • Work on Acids and Bases Parts 1
& 2 questions
#22 – has two answers
#25 (NH4)2SO4
#24 “C” is listed twice –
2nd one should be a “D”

19. • Periods 1,3,5,6,8 – Acids &
Bases due Friday
• Period 2 – Acids & Bases due
Monday – Apr. 30
• Test # 3 corrections and self
assess.- Due Tomorrow.