0
The difference is in the denominators.
Molarity (M) - the number of moles of solute divided by the number of liters of solution.
Molality(m) - the number of moles of solute divided by the number of kilograms of solvent.
Still curious? Ask our experts.
Chat with our AI personalities
Rafa
Jordan
DevinMolality is the concentration of a solution expressed as moles of solute per kilogram of solvent, while molarity is the concentration of a solution expressed as moles of solute per liter of solution. Molality is temperature-dependent, while molarity is temperature-independent.
Add your answer:
Earn +20 pts
Why molarity is better than molality?
Molarity is better than molality for many applications because it is more commonly used and easily measured in the laboratory. Additionally, molarity accounts for volume changes with temperature, whereas molality does not. This makes molarity more versatile for a wider range of experimental conditions.
What is the difference between the symbols used to represent molarity and molality in a solution?
The symbol used to represent molarity is "M," while the symbol used to represent molality is "m." Molarity is the concentration of a solute in a solution in terms of moles of solute per liter of solution, while molality is the concentration of a solute in a solution in terms of moles of solute per kilogram of solvent.
Why do we have to use molality for our calculations, instead of the more common unit of molarity?
Molality is used for calculations instead of molarity because it is a more accurate measure of concentration. Molarity can change with temperature, while molality remains constant. This makes molality more reliable for certain calculations, especially those involving changes in temperature.
In biological applications it is often preferable to measure solution concentrations in molality rather than molarity especially if comparing solutions of two different substances This is because?
molality is preferred because it measures the amount of solute per mass of solvent, which is more temperature-independent compared to molarity. This makes it more accurate for comparing solutions of different substances since changes in temperature do not affect molality measurements.
When does molarity and molality become equal?
In dilute solutions... ie closer a solution is to pure water the closer molality and molarity come to equalling each other. This is because the molality uses mass and molarity uses volume, the ratio of these two (mass and volume) is density, and water has the density of 1 therefore the mass and volume are equal to each other. THEREFORE calculating the molarity of water is the same as calculating the molality of water.
