Acid Rain Is Less of a Threat to Lakes and Streams

question 9

Multiple Choice

Acid rain is less of a threat to lakes and streams in areas where the bedrock is limestone (CaCO₃) . Which of the following is the equation for neutralization of acid by limestone?

• A) CaCO₃ + 2OH^- → Ca(OH)₂ + CO₂
• B) CaCO₃ + 2H₃O⁺ → Ca²⁺ + CO₂ + 3H₂O
• C) CaCO₃ + H₃O → Ca + CO₂ + H₂O
• D) CaCO₃ + OH^- → Ca²⁺ + CO₂ + H₂O
• E) CaCO₃ + 2H₃O⁺ → Ca²⁺ + CO₂ + 2H₂O

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