Transcript Document

Natural Antacids
A Chemical Engineering Design Unit
Curt Blimline
Science Department Williamsburg High School, Williamsburg, OH
The Problem
The Challenge
Design a safe and effective antacid
from a natural organic food that
will neutralize the same amount
of acid as an over the counter
commercial antacid.
Academic Standards
The human stomach makes hydrochloric acid
to digest food. However, too much stomach
acid causes health problems such as
heartburn and acid reflux. Many over the
counter and prescription antacids have been
developed to treat this problem. Most of
these products use inorganic chemical
compounds to neutralize stomach acid. With
an increasingly health conscious population,
treatment of this problem through natural
organic substances is gaining more attention.
What natural organic foods are effective at
neutralizing stomach acid and could be
potential remedies for excess stomach acid?
1. Identify questions and concepts that guide
scientific investigations;
2. Design and conduct scientific investigations;
3. Use technology and mathematics to improve
investigations and communications;
4. Formulate and revise explanations and
models using logic and evidence (critical
thinking);
5. Recognize and analyze explanations and
models; and
6. Communicate and support a scientific
argument.
7. Chemical reactions
a. Types of reactions
b. Energy
c. Equilibrium
d. Acids/bases
Unit Activities
Activity 1
Acids vs. Bases – exploring the properties of acids and bases
Guiding Questions
1. Does the substance or substances have an
appealing taste?
2. How readily available is the substance or
substances?
3. How effective is the substance at neutralizing
acid?
4. Are there any side effects or allergies
associated with the substance(s)?
5. What are the health advantages and
disadvantages of the substance(s)?
6. Will the substance be able to replace an over
the counter antacid?
7. Does the substance require any special
preparation or storage?
8. What is the substance’s shelf life?
9. How do you know the substance is still safe to
use?
Activity 2
Acid Base Titration – investigating acid base neutralization
and titration
Activity 3
Commercial Antacid Investigation – investigating over the
counter antacids for their acid neutralization capacity
Activity 4
Natural Antacid Design Project – design project
The Product
PowerPoint Presentaion that includes:
1. your web research,
2. the three substances that you identified to
investigate,
3. the lab design and processes used,
4. the lab results including data tables, data
analysis, and graphs,
5. the natural antacid that your team chose as
best,
6. the amounts needed to neutralize the
equivalent of the extra strength Tums tablet,
7. any health concerns about the use of your
antacid.
Curt Blimline
Contact Information:
[email protected] 513.724.2211