Acids, Bases and the pH Scale pH Science Buddies: Acids, Bases, & The pH Scale baking soda is a 9 pH level molecules split up pH of 2 five on the pH scale source basic and acidic and the ph scale Chemical Acids and Bases pH Acids Bases and the pH Scale sciencebuddies.org Science Buddies one hundred trillion at least as acidic pH of 2 pH value