Bio Lab

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Topics: PH, Blood
Bio 104-03
Lab #3- Acids Bases, and Buffers
1. An acid is a substance that releases hydrogen ions as they desolve in water and ranks lower than seven on the pH scale. An example of an acidic substance is lemon juice.
A base is a substance that accepts hydrogen ions and ranks higher than seven on the pH scale. An example of a base substance is hand soap.
A neutral substance ranks a seven on the pH scale and has equal concentrations of H+ and OH-. An example of this is pure water.
Electrolytes are current conducting ions. An example of an electrolyte is Na+.
A buffer is a set of chemicals that can keep the pH of a stable by alternately donating and accepting ions that contribute to pH. An example of this is carbon dioxide.
A salt is a compound that dissolves easily in water and releases ions other than H+ and OH-. An example is when sodium chloride splits into sodium and chloride ions.
2. The substances that I found to be bases are window cleaner, hand soap, baking soda, baking powder, bleach, Lysol, and antacid. These substances were found to be bases because after testing them by dipping pH paper into a well filled with about three drops of the substance, the color of the paper turned to a color correlating with the color of an eight or higher on the pH scale.
3. The substances that I found to be acids are vinegar, mouthwash, gastric juice, black coffee, and lemon juice. These substances were found to be acids because after testing them by dipping pH paper into a well fill with about three drops of the substance, the color of the paper turned to a color correlating with the color of a six or lower on the pH scale.
4. The substances that I found to be neutral are distilled water and tap water. These substances were found to be neutral because after testing them by dipping pH paper into a well filled with about three drops of the substance, the color of the paper turned to a color correlating with the color of a seven on the pH scale.
5. During

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