Question

A solution with a pH of 11 has a [H+] of:
A) 11
B) 1 x $10^{-3}$
C) 1 x $10^{-11}$
D) 1 x $10^{11}$
E) 1 x $10^{3}$

Answer 1

answer is C

to find the H+ concentration given the pH, you need to use the following formula

[H+]= 10^-pH

[H+]= 10^-11= 1 x 10-11

Answer 2

Answer : The correct option is, (C) $1\times 10^{-11}M$

Explanation : Given,

pH = 11

pH : It is defined as the negative logarithm of hydrogen ion cocnetration.

Mathematically it is represented as :

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

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

$11=-\log [H^+]$

$[H^+]=1.0\times 10^{-11}M$

Therefore, the hydrogen ion concentration is $1\times 10^{-11}M$