pH of 1L solution is 2, then how much water should be added to make pH = 5.

To calculate the amount of water that needs to be added to the 1L solution in order to achieve a pH of 5, we need to consider the initial pH and the desired pH.

Step 1: Calculate the initial concentration of H+ ions in the solution. The pH of 2 indicates that the concentration of H+ ions is 10^-2 M. This is because the pH scale is logarithmic, and each unit change in pH represents a tenfold change in H+ ion concentration.

Step 2: Calculate the desired concentration of H+ ions in the solution. A pH of 5 corresponds to a concentration of H+ ions of 10^-5 M.

Step 3: Calculate the difference in concentration between the initial and desired pH. The difference in concentration is given by: Difference in concentration = Initial concentration - Desired concentration Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M - 10^-5 M Difference in concentration = 10^-2 M -