Respuesta :
Answer :
The concentration of [tex]H^+[/tex] before any titrant added to our starting material is 0.200 M.
The pH based on this [tex]H^+[/tex] ion concentration is 0.698
Explanation :
First we have to calculate the concentration of [tex]H^+[/tex] before any titrant is added to our starting material.
As we are given:
Concentration of HBr = 0.200 M
As we know that the HBr is a strong acid that dissociates complete to give hydrogen ion [tex]H^+[/tex] and bromide ion [tex]Br^-[/tex].
As, 1 M of HBr dissociates to give 1 M of [tex]H^+[/tex]
So, 0.200 M of HBr dissociates to give 0.200 M of [tex]H^+[/tex]
Thus, the concentration of [tex]H^+[/tex] before any titrant added to our starting material is 0.200 M.
Now we have to calculate the pH based on this [tex]H^+[/tex] ion concentration.
pH : It is defined as the negative logarithm of hydrogen ion concentration.
[tex]pH=-\log [H^+][/tex]
[tex]pH=-\log (0.200)[/tex]
[tex]pH=0.698[/tex]
Thus, the pH based on this [tex]H^+[/tex] ion concentration is 0.698
