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science

dgd
by

Hannah Solveson

on 17 May 2010

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Transcript of science

2NO2 + H2O ---> HNO3 +HNO2 ACiD RAiN Nitrogen Dioxide Reactants Products Which Atoms? 2 Nitrogen
5 Oxygen
1 Hydrogen Catalyst? A catalyst increases the speed of a reaction without itself being affected. There is no catalyst present in the Nitrogen Dioxide formula for acid rain, although in other types of acid rain a catalyst may be present. Some sources say that lightning could be considered a catalyst in this equation, because it causes the high temperature in which the nitrogen oxides are produced. What's Happening? At high temperatures, the gases nitrogen and oxygen react together in the air, forming nitrogen dioxide. The Nitrogen Dioxide then reacts with water, forming acid rain. 2NO2 + H2O ---> HNO3 +HNO2 Balanced? Yes. This equation is balanced. On both sides there are 5 Oxygen atoms, 2 Nitrogen atoms, and 2 Hydrogen atoms. Why's It Matter? The law of conservation of mass states that matter cannot be created or destroyed, only transferred. This applies to chemical equations because from the reactants to the products, you cannot lose or gain any extra atoms because the equation would then be unbalanced, and also not follow the law. How does acid rain affect acuatic life? Pure water has a pH of 7 being a neutral. The pH of natural rain water is generally at 5.6 or above, being slightly acidic. When rain reaches a pH below 5.6, it is considered to be acid rain. Most rivers, lakes, and streams are at a pH between 6 and 8, where most acuatic life is content living in. Due to acid rain and other pollutants to the bodies of water, they become more acidic. Acid rain can cause a handful of affects to the fish and other organisms in the waters ranging from harming or killing an individual fish, reducing fish population numbers, all together eliminating a species from a body of water, and decreasing the biodiversity of the different species. When acid rain falls into the soil, the soil can produce aluminum, which can flow into the rivers, lakes, and streams, while the pH level will decrease. This is just like a toxin to the life in these waters. In many cases, an increase in aluminum levels and decrease in pH level can result in weight loss and body size decrease that can cause a fish to become unable to compete for food and even to live in its own habitat. Sources of Nitrogen Oxides Natural Source
lightning bolts
Human Sources
combustion of coal and oil plants
combustion of gasoline in automobiles How does acid rain affect us? To people with asthma, the acid rain can cause serious breathing problems.
Can cause cough with children
Overall illness in the respiratory system What can we do? 1. Reduce number of trips taken by automobiles
2. Not using as much energy in your home
Turning off hot water tanks when you're away
Turning down the heat at night
Running dishwasher and washing machine with only full loads

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