tested the purity of water by looking for the chemicals free chlorine‚ chloride‚ sulfate‚ nitrate‚ copper‚ total hardness‚ iron‚ hydrogen sulfide‚ lead‚ pesticides‚ pH‚ total alkalinity‚ and total chlorine inside a water sample. The chemicals that produced a 0.0 result meant that there was no trace of that chemical inside the sample. The chemicals not found were copper‚ hydrogen sulfide‚ free chlorine‚ lead‚ iron‚ pesticide‚ and total chlorine. As a class we found the results of the other chemicals
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Tips for Choosing the Chlorine Tablets in Bethel OH When you have a septic system‚ it is important that you are properly maintaining it. This includes making sure it is pumped and avoiding flushing anything but tissue‚ but this responsibility also includes using chlorine tablets. Chlorine tablets are the perfect way to ensure wastewater and effluents are sanitized prior to leaving your septic system. Not only do they kill bacteria‚ but they also decrease the chances of this bacteria causing harm
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Guess Paper – 2009 Class – X Subject – Chemistry (P- Block Elements) Kalra sir 09460472649 kalra1977@rediffmail.com Group 15 elements: |Symbol |Atomic |Electronic configuration | | |number | | | |7 |[He]2s22p3 | |N | | | |P |15 |[Ne] 3s23p3 | |As |33 |[Ar]3d104s24p3
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oxide = magnesium sulphate + water Sodium hydroxide is a corrosive metallic base‚ and it is also called caustic soda. Nowadays‚ it is made along with hydrogen and chlorine‚ using the chloralkali process (any process that produces chlorine or a related oxidizer ) Electrolysis of a solution of sodium chloride (common salt) makes chlorine and sodium hydroxide. 2NaCl + 2H2O --electric
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ways does chlorine in water affect our bodies? Chlorine is used as a disinfectant in water to prevent bacterial growth and transmission of harmful viruses‚ however studies show that the use of chlorine in our water can have serious negative impacts on our bodies. Chlorine is a chemical element which appears as a form of greenish-yellow gas but also appears in liquid and solid form‚ it is used widely in our daily lives. From our drinking water to our swimming pools‚ we use chlorine to cleanse
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…………………………………………………………….. Year 12 80% A 70% B AS Level Chemistry 60% C 2008 – 2009 50% D 40% E Below U Questions on % Haloalkanes 2.8 32 1. Chloromethane can be prepared by a reaction between methane and chlorine in the presence of ultraviolet radiation. (i) Outline the mechanism for this reaction. ..................................................................................................................................... .....................
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If the positive metal ions in the solutions are less powerful reducing agents‚ then the metal in the plate will be reduced and hence form a deposition of solid metal. e.g. Zn + Pb2+-> Zn2+ + Pb EXPERIMENT 2: Aim: To range the halogens bromine‚ chlorine and iodine‚ with the strongest oxidising agent first. Hypothesis: A strong oxidising agent is a species that easily gains electrons‚ and is hence easily reduced. The ionisation energy of the halogens (Cl2‚ I2‚ Br2) decreases down the group‚ which
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UNICEF PROMOTION OF HOUSEHOLD WATER TREATMENT AND SAFE STORAGE IN UNICEF WASH PROGRAMMES January 2008 PROMOTION OF HOUSEHOLD WATER TREATMENT AND SAFE STORAGE IN UNICEF WASH PROGRAMMES Why is household water treatment and safe storage an important intervention for preventing disease? Unsafe drinking water‚ along with poor sanitation and hygiene‚ are the main contributors to an estimated 4 billion cases of diarrhoeal disease annually‚ causing more than 1.5 million deaths‚ mostly among children
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organisms like bacteria‚ virus‚ yeast‚ spores and fungus. Even in swimming pools‚ calcium hypochlorite proves to be a very efficient disinfectant. It is normally available in tablet form or a simple white powder which is highly stable than normally used chlorine. Such a kind of cleaning process is known as “pool shock.” Simple three step process for disinfecting
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help you to answer this question. Oxygen is in Group 6 of the periodic table. a i How many protons are in an atom of oxygen? (1) ii How many electrons are in an atom of oxygen? (1) b Chlorine is in Group 7 of the periodic table. Complete the electronic structure of chlorine: 2‚ ........... (1) c Fluorine is also in Group 7. Explain why in terms of electronic structure. (1) d Neon and argon are in Group 0 of the periodic table. They are very unreactive elements
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