![]() For dilution to decrease the acidity or basicity of a solution, the solvent being used must be less acidic or basic than this solution.Īlternatively, an acidic diluent may be used to dilute a basic solution, or vice versa, in a neutralization reaction. The pH scale is logarithmic with a base of 10, meaning each integer pH value is 10 times more acidic or basic than the one preceding or succeeding it respectively. pH values greater than 7 are basic, while pH values less than 7 are acidic. The pH scale covers a range between 0 and 14 pH. Since a pH value is an expression of the concentration of these ions, changing these concentrations by introducing more solvent causes the pH value to change. Diluting an acid reduces the concentration of the H+ ions that cause acidity, while diluting a base reduces the concentration of the OH- ions that cause basicity.
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