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* 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* 10^(-11)M`

Therefore, the hydrogen ion concentration is
`1* 10^(-11)M`