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What is the pH value of acid rain?

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A. Less than 5.6

B. More than 5.6

C. Equal to 7.0

D. More than 7.0

SOLUTION
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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