The resulting color will tell you how strong the vinegar is. Distilled white vinegar usually measures around pH 2.4, with a strength of 5%. The lower the pH, the more acid the vinegar is.
If you use vinegar for starter liquid for making kombucha, it should have a pH no higher than 4.5, and a strength of at least 5%.
Also, what is the pH level of acetic acid?
pH of common acids like sulfuric, acetic and more
What is the acidity of acetic acid?
Acetic acid is a weak monoprotic acid. In aqueous solution, it has a pKa value of 4.76. Its conjugate base is acetate (CH3COO−). A 1.0 M solution (about the concentration of domestic vinegar) has a pH of 2.4, indicating that merely 0.4% of the acetic acid molecules are dissociated.
Is acetic acid a weak acid?
Acetic acid (CH3COOH) is a carboxylic acid (RCOOH), and the majority of the carboxylic acids are weak acids, including acetic acid. On the other hand, 0.9 million molecules of stronger acids like HCL and H2SO4 can dissociate in a million molecules of water at room temperature.