Question

In a mountainous location, the boiling point of pure water is found to be 95°C. How many grams of sodium chloride must be added to 9 kg of water to bring the boiling point back to 99°C? Assume that i = 2.

So what will my answer be in grams?

delta T =i*Kb*molality
Solve for molality. i = 2 for NaCl.

molality = moles/kg solvent.
Solve for moles.

moles = grams/molar mass.
Solve for grams.

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