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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.
1 White vinegar, a weak acid, is about 5 percent acetic acid. It may remove hard water deposits from glass, rust stains from sinks, and tarnish from brass and copper.  Lemon juice, another weak acid, contains citric acid, which can be used in much the same way as vinegar.