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BIO 202L Lab 15 Worksheet - Electrolytes, Water, Acid & Bases
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BIO 202L Lab 15 Worksheet - Electrolytes, Water, Acid & Bases|BIO 202L Lab 15 Worksheet - Electrolytes, Water, Acid & Bases
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Lab 15 Electrolytes, Water, Acids & Bases BIO202LStudent Name:
Access Code (located on the lid of your lab kit):
Pre-Lab Questions:
1. How can eating a high-salt diet increase blood pressure?
Salt contains both sodium and chlorine and these two are needed for the body to maintain a
normal osmotic gradient. When a person eat a higher salt diet, blood pressure can increase
due to sodium level increasing higher than the normal osmotic gradient.
2. Research the following disorders and write a definition for each:
a. Acidemia: is when there is a decrease in pH due to the increase in the hydrogen ion
in the blood and body tissues.
b. Alkalemia: is when there is a increase in pH due to the decrease in the hydrogen
ion in the blood and body tissues.
c. Acidosis: is when the acidity in the blood and body tissues increases
d. Alkalosis: is when hydrogen ion concentration in the blood and the tissues are
reduced or decrease.
3. Name three ways the body regulates the pH of blood.
The body regulates the pH of blood by one, chemical buffers (through bicarbonates), two
reducing CO2 which reduces HCO3 production, and three by renal regulation through the
mechanism of renin-->angiotensin-->aldosterone.
Experiment 1: Breathing and Acid-Base Balance
Table 1: Color Change of Sodium Bicarbonate Solution With and Without the
Addition of CO2
Beaker Starting Color Final Color Time to Change to Final Color
1 Dark pink Light pink 1 minute and 28 seconds
2 Dark pink Light pink 2 minutes and 30 seconds
Post-Lab Questions
1. Was the time required to change the solution different for the two beakers? Why or why
not?
Yes, the time required to change to solution is different. My results shows that Beaker 1
changes the color 1.48 minutes, and the Beaker 2 in 2.5 minutes. This is due to the chemical
buffer (bicarbonate). Beaker 1 had no buffer which allowed the pH to start dropping as soon as
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