Question

Calculate pH of 0.49 % weight by volume H2 S o4 solution.

Answer 1

0.49% W/V means 0.49 g H2SO4 in 100ml solution

number of moles of H2SO4 = W/M = 0.49/98 = 0.005

so, 0.005 mole H2SO4 present in 100 ml water

now concentration of H+ ion is = 2 × molarity
because 1 h2so4 dissociate to give 2 H+ ions

therefore conc. H+ is,

=2× molarity

=2× (0.005×1000/100)

= 0.1

now, pH = - log (H+ )
= - log (10^-1)
= 1

therefore pH =1

Answer 2

Explanation:

I hope this will help you.