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The pH of vinegar depends upon how much acid is present in it. The most commercial distilled white vinegars contain 5% acetic acid, and hence, has a pH value that ranges between 2.40 - 3.40. More Information on Vinegar and its pH Levels. Though vinegar is available in different varieties, apple cider vinegar is the most commonly used example, which is prepared from apple cider.
Corn, lentils, winter squash and olives are all vegetables that are high in acid. For example, corn has a pH of 5.2, while lentils and olives have pH levels of 6.3 and 6, respectively.They still have fiber and other nutrients, but they are not good choices if you are trying to lower the levels of acid in your body.he acidity of foods, or other substances, are measured by their pH value -- their place on a 14-point pH scale.