Question

A solution of H 2 SO 4 ( aq ) H2SO4(aq) with a molal concentration of 4.80 m 4.80 m has a density of 1.249 g / mL . 1.249 g/mL. What is the molar concentration of this solution?

Answer 1

The answer to your question is Molarity = 4

Step-by-step explanation:

Data

molalidad = 4.8

density = 1.249 g/ml

molarity = ?

Process

1.- Calculate the moles of H₂SO₄

molality = moles / kilogram

Solve for moles

moles = molality x kilogram

Substitution

moles = 4.8 x 1

Result

moles = 4.8 moles

2.- Calculate the mass

- Mass of solute

Molar mass of H₂SO₄ = 2 + 32 + 64

= 98 g

98 g ----------------- 1 mol

x ----------------- 4.8 moles

x = (4.8 x 98)/1

x = 470.4 g

Total mass = 470.4 + 1000

= 1470.4 g

3.- Calculate the volume

Density = mass/volume

Volume = mass/density

Substitution

Volume = 1470.4/1.249

= 1177.3 ml

4.- Calculate molarity

Molarity = moles / volume (L)

Molarity = 4.8 / 1.177

Molarity = 4.0