Final answer:Coffee has a pH of approximately 5, and Coca-Cola has a pH around 3, according to the pH scale, with both being acidic.Explanation:The pH scale is a measure of the acidity or basicity of a solution. The pH of coffee on the pH scale is approximately 5, making it acidic. Similarly, the Coca-Cola® you might be drinking has a pH around 3, due to the presence of phosphoric, carbonic, and various other acids, making it significantly more acidic than coffee. The pH scale ranges from 0 to 14, with 0 being extremely acidic, 7 being neutral, and 14 being highly alkaline (basic). The acidity of these beverages is important to consider, as it can impact both the flavor and health effects when consumed....

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