Acidic lakes are treated with this.

Study for the Grade 9 Environmental Chemistry Test. Use a blend of multiple-choice questions and detailed explanations. Master key concepts and prepare effectively!

Multiple Choice

Acidic lakes are treated with this.

Explanation:
Liming treats acidic lakes by adding a base (lime) to neutralize the excess hydrogen ions in the water. This reaction raises the pH and increases alkalinity, making the water less acidic and more hospitable for aquatic life. In chemistry terms, calcium carbonate from lime reacts with H+, forming calcium ions and carbonate species (which buffer the acidity), so the lake’s buffering capacity improves and pH remains more stable over time. Flocculation targets particles, not the acidity of the water, and dilution would require enormous amounts of clean water and doesn’t address the chemical imbalance. Liming is the direct method used to restore the neutralization balance in acidic lakes.

Liming treats acidic lakes by adding a base (lime) to neutralize the excess hydrogen ions in the water. This reaction raises the pH and increases alkalinity, making the water less acidic and more hospitable for aquatic life. In chemistry terms, calcium carbonate from lime reacts with H+, forming calcium ions and carbonate species (which buffer the acidity), so the lake’s buffering capacity improves and pH remains more stable over time. Flocculation targets particles, not the acidity of the water, and dilution would require enormous amounts of clean water and doesn’t address the chemical imbalance. Liming is the direct method used to restore the neutralization balance in acidic lakes.

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