Question

A solution with a hydronium ion concentration of 10–11M has a pH of A. 4. B. 3. C. 11. D. 7.

Answer 1

pH = - log [ H+ ]

pH = - log [ 10⁻¹¹ ]

pH = 11

answer C

hope this helps!

Answer 2

Answer : The correct option is, (C) 11

Explanation :

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

Mathematically, it is represented as :

$pH=-\log [H^+]$

or,

$pH=-\log [H_3O^+]$

Now we have to calculate the pH of the solution.

$pH=-\log [H_3O^+]$

Now put the value of hydronium ion concentration in this expression, we get the value of pH of the solution.

$pH=-\log (1.0\times 10^{-11})$

$pH=-\log (1.0)-\log (10^{-11})$

$pH=-0-(-11)$

$pH=11$

Therefore, the pH of the solution is, 11