Jessica Luke 1
Experiment Title: General Laboratory Techniques
Course: Chemistry 112
Section: 04
TA: Amanda Appel
Date Due: 01/29/10
Laboratory Group:
Jessica Luke
Jamie Gustafson
Austin Dilts
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Jessica Luke 2
Abstract:
The pH of Coca Cola, Vinegar, Drano, and Ammonia was determined by both pH testing paper strips and
a pH meter. The pH meter obviously had a more accurate test than the paper strips.
Background:
Testing pH is revealing a substance as acidic, basic, or neutral.
An acid is a substance that releases
Hydrogen ions (protons) into a solution. A base is a substance that absorbs Hydrogen ions in a solution. A
pH scale ranges from 0-14. 1-6 pH numbers are ranges of acidic substances. Substances with a pH of 8-14
are bases. 7 is the pH of a neutral substance.
Procedure:
First pH paper strips were used. To determine the pH of a substance using the strips, you dip the strip into
the solution and it changes color. Match the colors as close as possible just by looking at the scale and
comparing it to the strip. Then enter the match and the computer automatically generated the exact pH of
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- Spring '10
- Hirko
- pH, pH meter, Jessica Luke
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