Question

The recommended pH for milk is between 7.1 and 7.2. Upon analysis, it is found to contain

10×10 −7 MH +
. Calculate its pH and make the necessary recommendation.
a. 10
b. 9
c. 8
d. 7

Answer 1

The pH of the milk tested is 7, which is neutral, but since the recommended pH for milk is between 7.1 and 7.2, the milk is slightly more acidic than the recommended range. Therefore, an adjustment to increase the pH to fall within the optimal range is necessary.

Step-by-step explanation:

The recommended pH for milk is between 7.1 and 7.2. Upon analysis, it is found to contain 10×10⁻⁷ M H+. To calculate its pH, we use the formula pH = -log[H+].

Inserting the given concentration:

pH = -log(10×10⁻⁷)

pH = -log(10⁻⁷)

pH = 7

Since the pH of the milk is exactly 7, it is neutral. However, as the recommended pH for milk is between 7.1 and 7.2, it is just slightly more acidic than preferred. The milk's pH should be adjusted slightly upwards to fall within the optimal range.