Hydrogen ion concentration of the substance is related to the acidity and basicity. As hydrogen ion concentrations differ over the very wide range, logarithms are utilized to create the compressed pH scale as follows:
ph=-log[H+]
Pure water has the pH of 7 that means that its neutral. Substances with the pH less than 7 are acidic, and those greater are basic. Determine pH of each substance listed, given indicated hydrogen ion concentration. Also, point to whether each substance is acidic or basic.
i) milk, 2.83x107
ii) garden mulch, 3.78 x 10-6