Mass of Sodium chloride ( NaCl ) = 20.5 g
Molar mass of Sodium Chloride ( NaCl )
= 58.5 g / mol.
Moles of Sodium Chloride = 20.5 / 58.5 mol.
= 0.350 mol.
Total Mass of water = 166.2 g .
Density of water = 1 g / ml .
So, Volume of water = 166 .2 ml .
For Dilute Solution
Volume of water = Volume of Solution
= 166.2 ml. = 0.1662 litre .
Molarity =
moles of NaCl / Volume of Solution in litre .
= 0.350 mol . / 0.1662 litre.
= 2.1058965102 M
= 2.11 M
= 2.11 mol/ litre .
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