Tennessee Wastewater Operator Practice Exam

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What is the chemical formula for sulfuric acid?

H2SO4
HCl
HNO3
Na2SO4

The correct answer is: H2SO4

The chemical formula for sulfuric acid is represented as H2SO4. This formula indicates that sulfuric acid is composed of two hydrogen atoms (H), one sulfur atom (S), and four oxygen atoms (O). Sulfuric acid is a strong acid widely used in various industrial processes and is known for its highly corrosive nature. Its structure allows it to release hydrogen ions (H+) readily, which is characteristic of acids, and also forms sulfate ions (SO4²⁻) in solution. This dual capability is essential in many chemical reactions, including acid-base reactions and dehydration reactions. Understanding the composition of sulfuric acid helps in recognizing its characteristics and applications. For example, in wastewater treatment, sulfuric acid can be used to lower the pH of wastewater, aiding in the neutralization of alkaline substances. This knowledge is critical for operators managing wastewater treatment facilities, ensuring they can safely and effectively manipulate the chemical conditions of their processes.