science- The observation of the temperature

Jun 28th, 2015
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Allen University
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1. The apparatus was set up as shown in the figure above. 2. Lighted up the cigarette. The filter pump is turned on to suck the smoke. 3. The observation of the temperature, white cotton wool and litmus solution is recorded.

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AIM :To study the effects of smoking on the human respiratory systemMATERIALS : Cigarettes, white cotton wool, hydrogen carbonate indicatorAPPARATUS : U-Shaped tube, filter pump, test tube, rubber stopper, retort stand and clamp, rubber connecters, thermometerPROCEDURE1. The apparatus was set up as shown in the figure above.2. Lighted up the cigarette. The filter pump is turned on to suck the smoke.3. The observation of the temperature, white cotton wool and litmus solution is recorded.OBSERVATIONSThermometer - The temperature increasesWhite cotton wool - Changes to yellow blackLitmus solution - Changes from purple to redQuestions:1. What does the cotton wool in the U-tube represent?Lung2. What is the function of litmus solution?To show that cigarette smoke is acidic3. What are the substances in cigarette smoke that cause the cotton wool and litmus solutioncha

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