What is the molality of a solution made by dissolving 137.9g of sucrose in 414.1g of water? The density of the solution is 1.104 g/ml.
1 answer:
Answer:
Molality of solution = 0.973 m
Explanation:
Molality : It is defined as the moles of the solute per Kg mass of solvent.It is not temperature dependent.
Solute = Substance which is present in less quantity in the solution is called the solute. Here ,<u><em> Sucrose is the solute.</em></u>
Solvent = Substance which is present in more quantity is the solvent.<em><u> Here water is solvent.</u></em>
Density = It is defined as the mass per unit volume.
Mass of Solute = 137.9 g
Molar mass of sucrose =
= 12(mass of C)+22(mass of H)+11(mass of O)
= 12(12)+22(1)+11(16)
= 144+22+176
= 342 g/mol
Moles = 0.403 moles
Mass of Solvent = 414.1 g (water)
Molality = 0.973 m
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