pH

Question 6 • Foothill-B Period-Chemistry-26/27B

Choose the most alkaline substance in the group.

Answer

soda, pH = 2.5

household vinegar, pH = 3

distilled water, pH = 7.0

milk of magnesia, pH = 10.5

Explanation

Alkaline substances have a pH greater than 7, and the higher the pH, the more alkaline the substance. Milk of magnesia has a pH of 10.5, higher than distilled water at 7.0, vinegar at 3, and soda at 2.5. Therefore, milk of magnesia is the most alkaline.

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