Which statement is true for a solution when its concentration of hydroxide ions increases? it becomes more acidic. it becomes less alkaline. its ph value increases. its ph value decreases.

Option (c) is the correct answer.

Explanation:

When we increase the concentration of a substance then it means we are increasing number of molecules of the substance. So, when there is increase in concentration of hydroxide ions the it means there are more number of ions into the solution.

Also, it is known that pOH =

Since there is increase in concentration so, this means that there will be decrease in the value of pOH.

Also,   pH + pOH = 14

so,                pH = 14 - pOH

                    pH = +ve

Thus, we can conclude that there will be increase in the value of pH.

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