List of pH value of some important substances in pdf . for competitive job exam like ssc, psc, wbcs, railway, esic, lic, bank and other competitive exam.

The Invention of pH Scale

All acids produce H+ ions when dissolved in water, but it's how much H+ a specific acid can produce in water that will determine whether it is able to safely eaten or not. But how do we formulate and measure H+ concentration. Søren Peder Lauritz Sørensen, a Danish chemist, contemplated this query while he worked at the laboratories of a industrial brewery in Copenhagen. It was in 1909 that he developed a method of quantifying acidity, now which is known as the pH scale. His scale works with the aid of genuinely changing the concentration of hydrogen ions in a technique to a number of between 0(zero) and 14. If a chemical is an acidic, then its pH will always be below the 7 on the scale. The lower of the number is the higher of the hydrogen ion concentration. The pH scale is a logarithmic one, meaning that one unit difference on the scale, say from 3 to 2, means a tenfold difference in H+ concentration. But zero to seven is only half of the scale.

pH valu -important-substances