Question

density of 2 M OF NaCl is 1.117g/ml.find the motality of the solution...

Answer 1

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➡Molarity= 2M
➡Molar mass of NaCl =58.5
➡M= mass of solute/molar mass of solute ×volume
➡mass=2×58.5=117g
➡density=1.117=mass/volume
➡density=1.117mass/volume
➡mass= density × volume
➡1.117×1000
➡1117g
➡mass of solvent= mass of solution -mass of solute
➡1117-117
➡1000g

➡Molarity (m)= mass of solute/molar mass of solute ×mass of solvent
➡117×1000/58.5×1000
➡2m
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