Is there any relation btwn molality and molarity? plz tell me.!
molality = Molarity÷(density of solution-Molarity×Molecular weight of solute)m = M/[d-(M×W)]All in SI units.
Is there any relation btwn molality and molarity? plz tell me.!
Molality vs Molarity
Molality and molarity are both measures of concentration, but they differ in how they are calculated and what they represent.
Molality
- Molality is defined as the number of moles of solute per kilogram of solvent.
- It is represented by the symbol "m" and is calculated using the formula:
molality (m) = moles of solute / kilograms of solvent.
- Molality is temperature independent, as it is based on the mass of solvent rather than the volume.
- It is commonly used in colligative properties calculations, as it takes into account the solvent mass.
Molarity
- Molarity is defined as the number of moles of solute per liter of solution.
- It is represented by the symbol "M" and is calculated using the formula:
molarity (M) = moles of solute / liters of solution.
- Molarity is temperature dependent, as it is based on the volume of the solution.
- It is commonly used in chemical reactions and dilution calculations, as it relates to the volume of the solution.
Relation between Molality and Molarity
- The relationship between molality and molarity is influenced by the density of the solvent.
- As the temperature changes, the volume of the solvent changes, affecting the molarity, while the mass of the solvent remains constant, keeping the molality unchanged.
- The conversion between molality and molarity involves the density of the solvent, as density is the ratio of mass to volume.
- To convert from molality to molarity, the density of the solvent must be known, as molarity depends on volume.
- The relationship between molality and molarity is important in understanding concentration units and their applications in various chemical calculations.
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