1 mol of NaOH is dissolved in 30 moles of water. Calculate molality of the solution.
The correct answer is 1.8518 m.
Please explain step by step.
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Answer:
The answer is 1.8518 mol /Kg
Explanation:
Molality (m)= no of moles of solute/kg of solvent
Given data:
No of moles of solute (NaOH) = 1 mole
No of moles of solvent (H2O) = 30 moles
From no of moles of H20 calculate the mass of solvent in kg.
Mass of solvent (water) = No of moles of water x molar mass of water
= 30 x 18
= 540 g
Convert in kilogram by diving with 1000
= 540 / 1000 = 0.54 Kg
Put the values in above formula.
Molality (m) = 1 mole / 0.54 Kg
= 1.8518 mol /Kg
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