Question

Household ammonia has a pH of 11, therefore its H+ concentration is __________ than water with a pH of 7

Answer 1

Household ammonia has a pH of 11, therefore its H+ concentration is less than water with a pH of 7

Answer 2

Explanation:

It is known that pH = $-log [H^{+}]$.

So, when pH is given as 11 then calculate the concentration of hydrogen ions as follows.  

                         pH = $-log [H^{+}]$

                            11 = $-log [11]$      

                       antilog (-11) = $[H^{+}]$

               $[H^{+}]$ = $1.67 \times 10^{-5}$  

Therefore, concentration of hydrogen ions is $1.67 \times 10^{-5}$.    

Thus, we can conclude that household ammonia has a pH of 11, therefore its H+ concentration is less than water with a pH of 7.