Question: 19. On the pH scale, each unit change in pH represents a tenfold increase in acidity or alkalinity. According to the diagram, grapefruit at 3.4

19. On the pH scale, each unit change in pH represents a tenfold increase in acidity or alkalinity. According to the diagram, grapefruit at 3.4 is how many times as acidic as baking soda (9pH)

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