SOLUBILITY OF GASES LAB - SOLUBILITY OF GASES LAB Background pH is a measure of the concentration of acid in a solution The higher the pH the lower the


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SOLUBILITY OF GASES LAB Background: pH is a measure of the concentration of acid in a solution. The higher the pH the lower the acid concentration and the lower the pH the higher the acid concentration. All carbonated drinks contained dissolved carbon dioxide. The prescence of carbon dioxide in water produces carbonic acid. Therefore the more carbon dioxide present in a solution the greater the concentration of acid in that solution. We can determine the acid concentration of a solution with the use of a pH meter. The lower the pH reading the higher the acid concentration and vice-versa. Purpose: Explain how the concentration of dissolved carbon dioxide gas changes as the temperature of a solution containing dissolved carbon dioxide decreases. CO 2   + H 2 O     H 2 CO 3 Materials: Vernier pH meter 400 mL beaker hot plate thermometer. 200 ml beaker seltzer, straw, tap water Procedure. 1) open laptops and search on laptop for logger pro 2) open logger pro 3) hook up vernier hardware to computer
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Unformatted text preview: 4) obtain 200 mL of tap water and record its pH 5) below air into the tap water for approximately 20 seconds and record its pH 6) pour 300 mL carbonated beverage in to 400 mL beaker and record its pH 7) place 400 mL beaker with beverage on hot plate and slowly warm carbonated beverage recording the pH in 5 degree temperature increments. 8) Design a graph to plot the inverse log of the pH vs. the temperature. The inverse log of the pH shows the concentration of the acid. (if you are having trouble with your scale try multiplying the concentrations by 1000. Post lab question: answer underneath or on the back of your graph. Explain how the concentration of a gas will change with an increase in temperature. Use your graph to determine what an increase in the world’s water temperature would do to the dissolved oxygen content of our lakes and rivers. What impact may global warming have on the aquatic life in the lakes and rivers....
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