As the [h+] in a solution decreases, what happens to the [oh–]? a. it increases and the ph increases. b. it increases and the ph decreases. c. it increases and the ph stays constant. d. it decreases and the ph increases. e. it decreases and the ph decreases.

Answer : The correct option is, (A) It increases and the pH increases.

Explanation :

pH : It is defined as the negative logarithm of hydrogen ion concentration.

Mathematical expression is,

pH is indirectly proportional to the concentration of hydrogen ion.

As per question, when the concentration of hydrogen ion decrease that means the the value of pH increases. When the value of pH increases that means the solution is basic and the concentration of hydroxide ion increases.

Hence, as the in a solution decreases, the increases and pH also increases.

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