Which of the following acid-base pairs will give a salt whose solution will have a pH of 5.52 1.Hydrochloric acid and Sodium hydroxide 2. Hydrochloric acid and Ammonium hydroxide 3.Carbonic acid and sodium hydroxide 4. Acetic Acid and Ammonium hydroxide
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Answer:
hydroxide
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Pouring concrete and working it are messy jobs. In the process, a lot of wastewater with an alkaline pH is generated. Often, regulations require that this wastewater be cleaned up at the site. One practical way to neutralize the basic pH is to bubble CO2 into the water. The carbon dioxide forms a weak acid (carbonic acid, H2CO3) in solution which serves to bring the alkaline pH down to something closer to neutral.
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