Question

How many times more basic is a solution with a pH of $10$ than a solution with a pH of $8$?

• A. A pH of $10$ is two times as basic
• B. A pH of $8$ is two times as basic
• C. A pH of $10$ is $2.000$ times as basic
• D. A pH of $8$ is $20$ times as basic
• E. A pH of $10$ is $100$ times as basic

Answer 1

The correct option is E A pH of $10$ is $100$ times as basic

Concentration of $O{H}^{-}$ in a $10$ $PH$ solution $=$ ${10}^{-}4$

Concentration of $O{H}^{-}$ in a $8$ $PH$ solution $=$ ${10}^{-}6$

Ratio $=$$\left({10}^{-}4/{10}^{-}6\right)$$=$100

so $10$ $PH$ solution is $100$ times more basic than $8$ $PH$ solution