First, we require the density of ice. This is 57.2 lb/ft³.
Using the following formula, we can calculate the volume of ice:
density = mass / volume
volume = 57.2 / 6 lbs
Volume = 9.53 ft³ = 270 liters
Now, the molarity of a substance is the number of moles of solute per liter of solvent. Now that we have the liters of water, we now calculate the moles of NaCl,
moles = mass / molecular weight
moles = (2 lb * 454 g / 1 lb) / (58.5)
moles = 15.5
molarity = 15.5 / 270
molarity = 0.057 molar
