1. Add 15 mL of body of water and 10 drops of bromthymol sick indicator solving to individually ampule or test tube. Label the vials A, B, C, D, and Control.
2. Fill each wallow until it has a 10 diameter.
Sample A (Ambient Air) - Use a tire pump to inflate the balloon to the required diameter. number the rubber know of the balloon and fasten it shut with a twist unite. The tie should be at least 1 cm from the opening of the balloon. Record the color of the balloon apply for this sample.
Sample B (Human Exhalation) - Have one team appendage blow up a balloon to the required diameter. tip and tie the balloon, and record balloon color.
Sample C (Automobile Exhaust) - Your teacher will supply you with this balloon. Record the color.
3. Soften the clay and tramp it around one end of the straw to make a small airtight compass that will fit into the neck of a balloon. The collar should look like a cone cell with the straw in its middle, and should be large enough to mastication the neck of the balloon.
4. Pick up Balloon A. Keeping the tie on it, slip the balloons neck over the clay collar and hold it against the collar to make an airtight seal. Place the new(prenominal) end of the straw into the vial of water and bromthymol blue labelled A.
Slowly untwist the balloon, keeping the neck of the balloon twitch to control the flow of gas, gently squeeze the balloon so the gas slowly bubbles through the solution.
5. Repeat the same mathematical operation with the other balloons and their respective vials. In some cases, the bromthymol blue solution will change color, from blue to yellow, indicating the presence of carbonic venomous formed from CO2.
6. Analyze each of the samples by titrating them with drops of dilute ammonia. ammonium hydroxide neutralizes the carbonic acid. The bromthymol blue will return to a blue color when all the acid has reacted. Add drops of ammonia to each of the samples that turned yellow, c arefully counting the number of drops needed until they are about the same color as your control....If you want to witness a full essay, order it on our website: Orderessay
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