LESSON 5: Concentration of Solutions

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maomao

Cards (19)

Solution 
A homogenous mixture of two or more substance
Solute 
the substance that is dissolved in a solvent
Solvent 
the substance in which a solute dissolves, usually present in the greatest amount
Dissolution 
process where a solute is gaseous, liquid or solid phase dissolves in a solvent to form a solution
Solubility 
The maximum concentration of a solute that can dissolve in a solvent at a given temperature
Solute has a higher boiling point compared to solvent
The physical state of solute can be solid, liquid or gaseous, whereas solvent in mainly in the liquid state, but can be gaseous as well.
Concentration 
refers ti the amount of substance in a defined space. The ratio of solute in a solution.
Molarity 
a unit of concentration expressed as the number of moles of dissolved solute per liter of solution
Molality 
total moles of a solute contained ina kilogram of a solvent. Also known as molal concentration
Mass percent 
ratio of mass of solute that is present in a solution, relative to the mass of the solute as a whole
Volume percent 
ratio of the volume of solute that is present in a solution
Mole fraction 
The number of moles of a specific component in the solution
Molarity depends on the volume of the solution since the volume of a solution changes with the change in temperature and pressure.
Molality is an intensive property of solutions, it only depends on the mass of solvent, hence it does not change with temperature and pressure.
Molarity is defined as the number of moles of a solute that are dissolved in 1 liter of a solution
Molality is defined as the number of moles of a solute that are dissolved in 1 kg of a solvent.
Molality is a more precise and accurate means of making a certain concentration because it is unaffected by temperature and pressure changes.
Molarity involves a liquid which means that the concentration can change. This is because the volume being a liquid can change with changes in temperature and pressure.