Calcium hydroxide (lime) is used to neutralize which wastes?

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Multiple Choice

Calcium hydroxide (lime) is used to neutralize which wastes?

Explanation:
Calcium hydroxide is used to neutralize acidic wastes because it is a base that raises pH by reacting with acids in the waste. In water, the hydroxide from lime combines with hydrogen ions from acids to form water, while calcium ions pair with the remaining anions to make salts. For example, Ca(OH)2 reacts with hydrochloric acid to give CaCl2 and H2O. This neutralization makes the waste less acidic and easier to treat downstream. It wouldn’t be effective for inert wastes (which don’t react), organic wastes (neutralization isn’t the primary treatment), or basic wastes (they’re already high in pH and don’t need neutralizing).

Calcium hydroxide is used to neutralize acidic wastes because it is a base that raises pH by reacting with acids in the waste. In water, the hydroxide from lime combines with hydrogen ions from acids to form water, while calcium ions pair with the remaining anions to make salts. For example, Ca(OH)2 reacts with hydrochloric acid to give CaCl2 and H2O. This neutralization makes the waste less acidic and easier to treat downstream. It wouldn’t be effective for inert wastes (which don’t react), organic wastes (neutralization isn’t the primary treatment), or basic wastes (they’re already high in pH and don’t need neutralizing).

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