what according to you should be the pH of dil. HCl and dil. NaOH solution? observe and explain your findings .
Answers
The acidic, basic or neutral character of any solution can be expressed by expressing its H+ ion concentration. A Danish biochemist Peter Sorensen suggested a method of expressing the concentration of H+ ions in terms of pH. In Danish language, pH stands for protenz de hydrogen which means power of H+ ions. pH of a solution is given by
pH = -log [H+] = log 1[H+]
where [H+] = concentration of hydrogen ions in solution.
To report the pH, a sFor an acidic solution, pH is less than seven.
For a basic/alkaline solution, pH is greater than seven.
For a neutral solution, pH is equal to seven.
The pH of a solution is measured accurately using an apparatus known as pH meter. An approximate value of pH can be obtained by using universal indicator/pH paper.
Indicators: are the substances which change the colour at a certain pH. Some common examples of indicators are litmus, phenolphthalein and methyl orange. Out of these, litmus is a natural indicator while phenolphthalein and methyl orange are synthetic indicators. cale from 0 to 14 was devised.