Question

If solution has the concentration of hydrogen ion as $1\times {10}^{-4}$ mole/liter, what is its pH?

• A. $10.5$
• B. $4.5$
• C. $4$
• D. $10$

Answer 1

The correct option is C $4$

If solution has the concentration of hydrogen ion as $1\times {10}^{-4}$ mole/liter, its pH will be 4.
$pH=-log\left[H^{+}\right]=-log1\times {10}^{-4}=4$