Suppose a pregnant woman with morning sickness has been vomiting steadily for several days. How will the loss of stomach acid affect the pH of her body fluids?
The pH scale is a way of measuring how acidic or basic a certain substance is. These two descriptors are on opposite ends of the scale and are an indication of chemical properties. A pH of 0 means that a substance is extremely acidic—examples include battery acid or lemon juice. A pH of 14 indicates an extremely basic substance, such as lye or ammonia. At 7, a substance is neutral, such as milk or pure water. Each increase in a certain direction along the scale means a ten-fold increase in the pH. For example, battery acid, at 1, is 10 times more acidic than lemon juice, at 2.
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