Question

The acidity of a water-based solution is defined as pH=−log[H⁺] , where [H⁺] is the hydrogen ion concentration, measured in moles per liter. Solutions with a pH-value of less than 7 are acidic; solutions with a pH-value of greater than 7 are basic; solutions with a pH-value of 7 (such as pure water) are neutral. Suppose that you test apple juice and find that the hydrogen ion concentration is [H⁺]=0.00032 . Find the pH-value of

Answer 1

To calculate the pH-value of apple juice with a hydrogen ion concentration of [H+]=0.00032 M, use the pH formula pH = -log[H+].

Step-by-step explanation:

The pH-value of apple juice with a hydrogen ion concentration of [H+]=0.00032 M can be found by using the formula pH = -log[H+]. To find the pH, you take the negative logarithm (base 10) of the hydrogen ion concentration. In this case, pH = -log(0.00032).

Before using a calculator, it's useful to understand that a hydrogen ion concentration of 0.00032 is the same as 3.2 x 10-4 in scientific notation. When you take the logarithm of 3.2 x 10-4, you'll get a value close to 4, because 10-4 is the factor that represents the power of ten in the concentration.

The precise calculation yields a pH slightly less than 4, which indicates that apple juice is acidic according to the pH scale. This is expected, as apple juice often has a pH ranging from 3 to 4.