Answer : The pH of 0.4 M [tex]H_2SO_4[/tex] is
Explanation:
pH or pOH is the measure of acidity or alkalinity of a solution.
pH is calculated by taking negative logarithm of hydrogen ion concentration.
[tex]pH=-\log [H^+][/tex]
[tex]H_2SO_4\rightarrow 2H^++SO_4^{2-}[/tex]
According to stoichiometry,
1 mole of [tex]H_2SO_4[/tex] gives 2 mole of [tex]H^+[/tex]
Thus 0.4 moles of [tex]H_2SO_4[/tex] gives =[tex]\frac{2}{1}\times 0.4=0.8[/tex] moles of [tex]H^+[/tex]
Putting in the values:
[tex]pH=-\log[0.8][/tex]
[tex]pH=0.096[/tex]
Thus pH is 0.096.
