Calculate the molality of 74.5 g of kcl dissolved in. 1kg of water
Answers
Answer:
The molality of KCl is 1 m
Answer:
The molality of the KCl solution is 1M.
Explaination:
First we calculate the number of moles of KCl and the mass of water in the solution.
The molar mass of KCl is 74.5 g/mol.
Number of moles of KCl = Mass of KCl / Molar mass of KCl
= 74.5 g / 74.5 g/mol
= 1 mole.
Mass of water = 1 kg = 1000 g
Now, we can calculate the molality of the solution using the formula:
Molality = Number of moles of solute / Mass of solvent in kg
Molality = 1mol / 1 kg
= 1 mol/kg. Or 1m.
Molality
Molality is a measure of concentration used in chemistry. It is defined as the number of moles of solute per kilogram of solvent. Molality is represented by the symbol "m".
Molality is preferred over other concentration measures like molarity because it is not affected by changes in volume that can occur with temperature and pressure changes.
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