Answer : The correct answer is " [H⁺] = [OH⁻] = 1 x 10⁻⁷ M
When pH is 7 , the solution is neutral means neither acidic nor basic.
So , [h+] > [oh–]; the solution is acidic and [h+] < [oh–] the solution is basic options cancels out .
If concentration of H+ and OH- is checked :
Step 1 : To find concentration of H+ using pH formula
the formula of pH = - log [H⁺]
Where ,[H+] = concentration of Hydrogen ions.
Given : pH = 7
Plugging values of pH in formula
7 = -log [H⁺]
To remove log ,antilog of 7 is taken
10⁻⁷ = [H⁺]
[H⁺] = 1 x 10⁻⁷ M
Step 2 :Concentration of OH⁻ =>
The relation between pH and pOH => pH + pOH = 14
pOH = 14-pH = 14 -7 = 7
pOH = 7
Relation between pOH and [OH⁻] is => pOH = -log [OH⁻]
Plugging value of pOH in formula
7 = -log [OH⁻]
[OH⁻] = 10⁻⁷ = 1 x 10⁻⁷ M
Hence concentration of [OH⁻ ]and [H⁺ ] = 1 x 10⁻⁷ M
