what is ph

pH is a measure of how acidic or basic a substance is. It is a scale used to specify the acidity or basicity of an aqueous solution. The term pH stands for "potential of hydrogen" or "power of hydrogen". The pH scale ranges from 0 to 14, with 7 being neutral. A pH less than 7 indicates acidity, while a pH greater than 7 indicates basicity. The pH formula is pH = -log(. The pH is a logarithmic measure of the concentration of hydrogen ions in a solution, meaning that increasing the pH by 1 corresponds to multiplying the concentration of H+ ions by 10. The pH is usually measured with a pH meter, which translates into pH readings the difference in electromotive force (electrical potential or voltage) between suitable electrodes placed in the solution.