|
TO
PREPARE SOLUTION
To
prepare this dilute hydrochloric acid solution, the teacher
or lab technician should add 2 ml of concentrated hydrochloric
acid to 1000 ml of distilled water. Weak solutions of HCl
are also available from commercial supply houses.
SAFETY
Review
all safety procedures associated with handling and using
potentially dangerous liquids within the classroom. Locate
the eyewash and demonstrate its proper use prior to distributing
these materials. Make sure that everyone wears safety goggles
and an apron to protect against chemical splashes. Identify
the location of the safety shower and review its proper
use.
ANSWERS
1. Hydrochloric acid and vinegar
2.
Calcium and other bone minerals went into solution, leaving
behind the spongy, protein tissue
3. They were both acids.
4. Water was used as a control liquid, since it has a neutral
pH.
.
. . . . . . .
CURRICULUM
LINKS
| Space
Science : |
| Planets,
gravity |
| Chemistry:
|
| Enzymes,
reactions, acids and bases |
| Biology:
|
|
Bone
structure, proteins, minerals
|
| Physics:
|
| Pressure,
strength of materials |
|
NATIONAL SCIENCE STANDARDS
| Science
As Inquiry |
5-8:
Abilities
necessary to do scientific inquiry,
Understandings about scientific inquiry |
9-12:
Abilities
necessary to do scientific inquiry,
Understandings about scientific inquiry |
| Earth
& Space Science |
|
5-8:
Structure of the Earth System
Earth's
History
Earth in the Solar System
|
9-12:
Origin
and Evolution of the Earth System |
| Life
Science |
5-8:
Structure and Function in Living Systems;
Diversity and Adaptations of Organisms.
|
9-12:
Matter
Energy and Organization in Living Systems |
| Physical
Science |
5-8:
Motions and Forces |
9-12:
Structure of Properties in Matter
Chemical Reactions
Interactions of Energy and Matter |
|
|
