Answer:
[H₂SO₄] = 4.56 M
Explanation:
35.2 % by mass of H₂SO₄ means that in 100 g of solution, we have 35.2 grams of solute.
We convert the mass of solute to moles.
35.2 g / 98 g/mol = 0.359 moles
These moles are contained in 100 g of solution, so we use density to determine the volume.
1.27 g/mL = 100 g / volume
Volume = 100 g / 1.27 g/mL = 78.74 mL
Molarity is mmol /mL (either we can say, moles in 1L of solution).
We convert the moles to mmoles → 0.359 mol . 1000 = 359 mmoles
M = 359 mmoles/74.74 mL = 4.56 M
