Acid Rain

Topics: Acid rain, Sulfur, Sulfuric acid Pages: 3 (751 words) Published: November 14, 2013

a)When it is considered that rain is acid?
= The pH scale measures how acidic an object is, when pH is lower than 7 rain is considered acid.

b)Which are the compounds that in contact with water origin acid rain? = Compounds like sulfur sulphuric and nitric acids.

c)Which are the principal causes of these compounds?
= The extra acidity in rain comes from the reaction of primary air pollutants, primarily sulphur oxides and nitrogen oxides, with water in the air to form strong acids. The main sources of these pollutants are industrial power-generating plants and vehicles. This means that this pollutants cause extra damage to Earth’s surface.

d)What effects does this cause over the planet?

The most obvious environmental effect of acid rain has been the loss of fish in acid sensitive lakes and streams. •Acid deposition may influence forest vegetation and soils. •Acid rain weakens the trees’ natural defenses, making them more vulnerable to diseases. •Acid rain may remove soil nutrients such as calcium and magnesium from soils in high elevation forests, etc.


Acid rain describes any form of precipitation with high levels of nitric and sulfuric acids. It can also occur in the form of snow, fog, and tiny bits of dry material that settle to Earth. Rotting vegetation and erupting volcanoes release some chemicals that can cause acid rain, but most acid rain falls because of human activities. The biggest culprit is the burning of fossil fuels by coal-burning power plants, factories, and automobiles. When humans burn fossil fuels, sulfur dioxide (SO2) and nitrogen oxides (NOx) are released into the atmosphere. These chemical gases react with water, oxygen, and other substances to form mild solutions of sulfuric and nitric acid. Winds may spread these acidic solutions across the atmosphere and over hundreds of miles. When acid rain reaches Earth, it flows across the surface in runoff water, enters water systems, and...
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