CBSE Class 11-science Answered
Given 18M H2SO4 solution with density 1.96 g per ml find Molality
Asked by Mudita Agrawal | 12 Sep, 2013, 09:57: PM
Expert Answer
18 M solution means that 18 moles of H2SO4 are present in 1 L solution.
Mass of H2SO4 in 1 L solution = 18 ×98=1764g (Since Molecular mass of H2SO4 = 98)
Density of solution = 1.96 gmL-1
Mass of 1L solution = 1000×1.96=1960g
Mass of water in solution =1960-1764=196g
Molality = Moles of solute × 1000
Mass of solvent (in g)
= 18 × 1000
196
=91.8m
Answered by Vaibhav Chavan | 13 Sep, 2013, 11:05: AM
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