Finding the mass for a calorimetry problem

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SUMMARY

The discussion centers on the necessity of using density in calorimetry problems to determine the mass of the solvent. While molarity and volume can be utilized to calculate the mass of the solute, the mass of the solvent requires knowledge of its volume and density for accurate computation. This distinction is crucial for solving calorimetry problems effectively, as relying solely on molarity does not provide a complete picture of the solution's mass components.

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  • Understanding of molarity and its calculations
  • Knowledge of density and its role in mass calculations
  • Familiarity with the concept of solute and solvent in solutions
  • Basic grasp of calorimetry principles
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fk378
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This is a general question... when given a calorimetry problem that states the molarity of the solution, the volume, and the density, why must the density be used in order to find the mass? Why can't the molarity be used (you can find moles and then use molar mass to convert to grams)?
 
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Using the molarity and the volume you can easily find the mass of the solute. What remains is the mass of the solvent of course. There is no easy way to calculate it aside from knowing its volume and density.
 

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