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The solubility of a solute is the sum of the solute present in a saturated solution at this temperature.
The Concentration of a Solution: 
A solution's concentration measures how much solute has dissolved in a given volume of solvent or solution. The concentrated solution is one in which the volume of dissolved solute is relatively high.
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Concentration of the solution in the image increases from left to right

The formula below is used to calculate the concentration of a solution.
 
\(\text{Concentration of solution}\) \(=\) \(\frac{\text{Amount of solute}} {\text{Amount of solvent or solution}}\)

There are various ways to express the concentration of a solution, but here, we will learn these three well-known methods:
  • Mass by mass percentage  
  • Mass by volume percentage
  • Volume by volume percentage
1. Mass by mass percentage.

We can find the mass percentage of a solution by dividing the mass of solute by the mass of the solution and multiply the product by \(100\).
 
Mass by mass percentage \(=\) \(\frac{\text{Mass of solute}}{\text{Mass of solution}}\) \(\times100\)

2. Mass by volume percentage.

We can find the mass volume percentage of a solution by dividing the mass of solute by the volume of solution and multiply the product by \(100\).
 
Mass by volume percentage \(=\) \(\frac{\text{Mass of solute}}{\text{Volume of solution}}\)\(\times100\)
  
3. Volume by volume percentage.
  
We can find the volume percentage of a solution by dividing the volume of solute by the volume of solution and multiply the product by \(100\).
 
Volume by volume percentage \(=\) \(\frac{\text{Volume of solute}}{\text{Volume of solution}}\)\(\times100\)