Acidity refers to the sourness or tartness of a substance. It describes the level of acid present in a substance, like lemon juice or vinegar, that gives it its sharp taste. Full definition
Because we don't know the percentage of acidity of each sauce, it is impossible to determine their shelf life or safety. (fieryfoodscentral.com)
However, in this case, since there is another source of acidity in the recipe (the sour cream), it might work fine. (brighteyedbaker.com)
The scientists have demonstrated that they can successfully isolate and capture carbon dioxide, which contributes to global warming, rising sea levels and the increased acidity of oceans. (rabett.blogspot.ru)