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G4 planning lab

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G4 Project Research Question: To find out the potability of drinking water at a brick kiln, by finding the pH of the water sample, the amount of oxygen that is dissolved in the water sample and by evaluating the chloride content of the water sample. Hypothesis: Brick Kilns are generally harmful for the environment. They have a very bad effect on the nearby areas. The water that is available near to a brick kiln that people drink is generally from a local well. The well being near to the brick kiln contains a lot of impurities and is harmful to the health of the person who consumes that water. So according to me, the amount of dissolved oxygen will be low in content than normal drinking water. The pH will also be wither less than 7 or more than 7 and this indicates that the water is neither acidic nor it is basic, but the water available for drinking should be neutral. The chloride content will be also high because of the impurities present in the water. Background Knowledge: The Brick Kiln where the study was conducted was an intermittent brick kiln. ...read more.


3) Apparatus for testing the dissolved oxygen content of the sample: * Measuring cylinders * Corks. * Burette (for titration); * conical flask; * graduated test tubes; * Manganese salt (Manganese Chloride); * Potassium Iodide + Potassium Hydroxide solution; * Sodium Thiosulphate solution; * Starch indicator solution, Conc. Hydrochloric acid; 4) Apparatus for testing the chloride content of the sample: * 10 cm2 pipette; * Burette; * distilled water in a wash bottle; * 3 C flasks, white tile; * potassium chromate indicator; * 50 cm3 silver nitrate solution. Procedure: 1) DISSOLVED OXYGEN CONTENT: The dissolved oxygen content can be found out using the Winkler's method. This method is from the point of view of chemistry students. The Winkler test is used to determine the concentration of dissolved oxygen in water samples. Dissolved Oxygen, abbreviated D.O., is widely used in water quality studies and routine operation of water reclamation facilities. An excess of Manganese(II) salt, iodide (I-) and hydroxide (OH-) ions are added to a water sample causing a white precipitate of Mn(OH)2 to form. This precipitate is then oxidized by the dissolved oxygen in the water sample into a brown Manganese precipitate. ...read more.


8.7 77 84 3) Brick Kiln puddle (dirty water) at a temperature of 24�C 2.8 34 22 4) Clean drinking water (from mineral water bottle) at a temperature of 24�C 11.4 127 86 * Note: The solubility of oxygen increases with a decrease in temperature. 2) Table 1.2: pH OF WATER SAMPLE: AREA OF INVESTIGATION for Water Sample pH (units) Quality Index 1) Brick Kiln tube well 8.2 77 2) Brick Kiln puddle (dirty water) 9 49 3) Clean drinking water (from mineral water bottle) 7.4 93 * NOTE: Rapids growing algae remove carbon dioxide from the water during photosynthesis, which can result in a significant increase in pH levels. 3) Table 1.3: CHLORIDE CONTENT OF WATER SAMPLE: AREA OF INVESTIGATION for Water Sample CHLORIDE CONTENT 1) Brick Kiln tube well 5.6 2) Brick Kiln puddle (dirty water) 6 3) Clean drinking water (from mineral water bottle) 4 Conclusion: According to the readings I have got by conducting the experiment, I think that the water in the well in contaminated and is not fit for drinking seeing the observations and result and it can be said that by consuming this water the people at the brick kiln can be affected by diseases. ?? ?? ?? ?? VIKAS DHAKA 2279-028 Page 1 of 8 ...read more.

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