Taking into account the definition of molarity, the concentration of a solution that contains 70 g of H₂SO₄ in 0,28 dm³ of solution is 2.5510 [tex]\frac{moles}{L}[/tex].
Definition of molarity
Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.
The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:
[tex]Molarity=\frac{number of moles}{volume}[/tex]
Molarity is expressed in units [tex]\frac{moles}{L}[/tex].
This case
In this case, you have:
- number of moles= 70 g×[tex]\frac{1 mole}{98 g}[/tex]= 0.7143 moles, where 98 g/mole os the molar mass of H₂SO₄
- volume= 0.28 dm³= 0.28 L (being 1 dm³= 1 L)
Replacing in the definition of molarity:
[tex]Molarity=\frac{0.7143 moles}{0.28 L}[/tex]
Solving:
Molarity= 2.5510 [tex]\frac{moles}{L}[/tex]
Finally, the concentration of a solution that contains 70 g of H₂SO₄ in 0,28 dm³ of solution is 2.5510 [tex]\frac{moles}{L}[/tex].
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