A 100 mL solution having 0.01 moles of NaOH dissolved in it. The pH of the solution is:
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 13.
pH ranging from 0 to 14, it measures the concentration of hydrogen ions in the solution. A pH less than 7 indicates an acidic solution, where there are more hydrogen ions, while a pH greater than 7 indicates a basic solution, where there are fewer hydrogen ions. A pH of 7 is neutral.
The concentration of OH- ions:
NaOH is a strong base that fully separates into its ions in solution.
So, [OH-] = 0.01 moles / 0.1 L = 0.1 M
Calculate the pOH:
pOH = -log[OH-] = -log(0.1) = 1
Calculate the pH:
pH = 14 - 1 = 13
Therefore, the pH of the solution is 13.