What is the pH value of acid rain?


A. Less than 5.6

B. More than 5.6

C. Equal to 7.0

D. More than 7.0

Online course (4)

The correct answer is Less than 5.6.

📝Important Points

  • Acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are discharged into the air.
  •  These substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.•
  • Human activities are the main cause of acid rain.
  • Over the past few decades, humans have released so many different chemicals into the air that they have changed the mix of gases in the atmosphere.
  •  Power plants release the majority of sulfur dioxide and much of the nitrogen oxides when they burn fossil fuels, such as coal, to produce electricity.
  • Besides, the exhausts from cars, trucks, and buses release nitrogen oxides and sulfur dioxide into the air. These pollutants cause acid rain.

💡Key Points

  • pH: Potential of Hydrogen
  • pH is a measure of how acidic/basic water is.
  • The range goes from 0 to 14, with 7 being neutral. pHs of less than 7 symbolize acidity, whereas a pH of greater than 7 indicates a base.
  • The concept of pH value is introduced in 1909 by Søren Sørensen as a suitable way of expressing acidity-the negative logarithm of hydrogen ion concentration.

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