If 9.8 g of sulfuric acid is dissolved in excess quantity moles of hydrogen ion is 0.1, 0.2. The correct option is A.
The mole is a SI unit of measurement that is used to calculate the quantity of any substance.
Molar mass H₂SO₄ = 98 g/mol
9.8 g H₂SO₄ = 0.1 mol
H₂SO₄ produces 2 H+ ions
Therefore, [H+] = 0.2 M
Number of H+ ions = 0.2 x 6.022 x 10²³ = 1.20 x 10²³ H+ ions
H₂SO₄ dissociates in 2 steps
The first dissociation is complete because H₂SO₄ acts as a strong acid here
H₂SO₄ → H+ + HSO₄-
Thus, the 0.1 mol H₂SO₄ will produce 0.1 mol H+ and the moles of sulfate ion is 0.2. The correct option is A.
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