Question

# A solution with a pH of 10 a. Has a hydrogen ion concentration [H+ ] of...

A solution with a pH of 10

a. Has a hydrogen ion concentration [H+ ] of 10^10 M

b. Has a hydroxide ion concentration [OH] of 10^4 M

c. Has twice as many H+ s as a solution at pH 8

d. Has 10× as many H+ s as a solution at pH 11

Ans. pH= potential of hydrogen, is a numeric scale used to specify the acidity or basicity of an aqueous solution. It is approximately the negative of the base 10 logarithm of the molar concentration. It is measured in units of moles per liter, of hydrogen ions. More accurately it is the negative of the base 10 logarithm of the activity of the hydrogen ion. Solutions with a pH value less than 7 are acidic and solutions with a pH value greater than 7 are basic. Pure water is neutral, at pH 7 (25 °C), being neither an acid nor a base. Contrary to popular belief, the pH value can be less than 0 or greater than 14 for very strong acids and bases respectively.

d. Has 10x as many H+ s as a solution at pH 11

Since, pH = - log [H+]

 pH Concentration of H+ Example 10 .001 Great salt lake 11 .0001 ammonia solution