What is ph scale? What is ph value of salt formed by (a) weak acid and strong base (b) strong acid and strong base
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In chemistry, pH is a logarithmic scale used to specify the acidity or basicity of an aqueous solution. More accurately it is the negative of the base 10 logarithm of the activity of the hydrogen ion. At 25 °C, solutions with a pH less than 7 are considered acidic and solutions with a pH greater than 7 are basic. The neutral value of the pH is 7. Pure water is neutral, that is pH 7 at (25 °C), being neither an acid nor a base.
pH value of a salt formed by
(a) weak acid and strong base is more than 7 because there is are still some hydroxide ions present in the aqueous solution which weren't neutralised in the reaction.
(b) strong acid and strong base should give a salt and water that is of neutral pH 7.
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