Question

Calculate the molarity of the concentrated H2SO4acid solution. Concentrated H2SO4acid solution is 98.0 % H2SO4by mass and the density of the solution is 1.83 g/mL.

Answer 1

ANSWER :-

Concentrated H2SO4 is usually available at a concentration of 98% by mass. The density of the solution is 1.83 g/mL.

Step 1. Calculate the mass of 1 L of solution.

Mass of solution=1000mL * (1.83 g /1ml) = 1830 g soln

Step 2. Calculate the mass of H2SO4

Mass of H2SO4 = 1830g soln * (98.0g H2SO4 / 100g ) = 1793 g H2SO4

Step 3. Calculate the moles of H2SO4

1793g H2SO4 * (1 mol H2SO4 / 98.079 g H2SO4=18.28 mol H2SO4

Step 4. Calculate the molarity of the H2SO4

Molarity = moles of H2SO4/ 1 litres of solution

Molarity = 18.28 mol/ L