Share
Explore BrainMass

Calculating the Approximate pH of Lemon Juice

Citric acid (pKa1 = 3.13, pKa2 = 4.76, pKa3 = 6.40) is found in citrus fruit. Calculate the approximate pH of lemon juice, which is about 5% citric acid by mass.

Solution Preview

Mean pKa = (pKa1 + pKa2 + pKa3)/3 = (3.13 + 4.76 + 6.40)/3 = 4.7633

Molar concentration:

Molar mass of ...

Solution Summary

Approximate value of pH of lemon juice has been calculated using the data.

$2.19