Question

Find the number of moles of the H+ ion in 155 mL of 1.575 M sulfuric acid (H2SO4) assume the acid fully dissociates

Answer 1

Given,

Volume of solution = 155 mL

Strength of the sulfuric acid (H₂SO₄) = 1.575 M

Strength of the acid solution = 1.575M means,

1000 mL of solution contain 1.575 mole of sulphuric acid molecule

So, 1 mL of solution contain = (1.575/1000) mole sulphuric acid molecule.

155 mL solution contain = (1.575/1000)×155 mole sulphuric acid molecule.

= 0.244 mole

(Up to 3 significant decimal place)

Chemical formula of sulphuric acid is = H₂SO₄

Assuming fully dissociation of H₂SO₄

1 mole of H₂SO₄ produces 2 moles of H⁺ iones

0.244 mole of H₂SO₄ produces (2×0.244) moles of H⁺ iones

= 0.488 mole of H⁺ ione

Hence,

number of moles of the H+ ion in 155 mL of 1.575 M sulfuric acid (H2SO4) assume the acid fully dissociates is = 0.488 mole