 # Potassium nitrate solution with mass fraction of 20%, in which solute: solvent: solvent = at 10 ℃, the solubility of a substance is At 10 ℃, the solubility of a substance is 5g. At this temperature, in the substance saturated solution, solute mass: solvent mass: solution mass= Mass fraction of solution=

## Potassium nitrate solution with mass fraction of 20%, in which solute: solvent: solvent = at 10 ℃, the solubility of a substance is At 10 ℃, the solubility of a substance is 5g. At this temperature, in the substance saturated solution, solute mass: solvent mass: solution mass= Mass fraction of solution=

Potassium nitrate solution with mass fraction of 20%, in which solute: solvent: solution = 1:4:5
At 10 ℃, the solubility of a substance is 5g. In the saturated solution of the substance at this temperature, solute mass: solvent mass: solution mass = 1:20:21
Mass fraction of solution = 1 / 21 * 100% = 4.76%

### When the solubility of a substance is 50g at 50 °, the mass fraction ratio of solute, solvent and solution in saturated solution at this temperature

Solubility refers to the mass of solute dissolved in 100g saturated solvent at a certain temperature
So the solute mass in this problem is 100g,
The mass fraction of solute is: 50 / (100 + 50) = 33.33%
The mass fraction of solvent is: 100 / (100 + 50) = 66.67%
The mass fraction of the solution is (it seems that I haven't seen how to find the mass fraction of the solution. Is it wrong, but if it's hard to ask): (100 + 50) / (100 + 50) = 100%

### Is solubility related to solute quality and solvent quality

Solubility has nothing to do with solute quality and solvent quality, but only with temperature
Because, at a certain temperature, the amount of solvent must be 100 grams, and the added solute must be the number of grams dissolved in the saturated state,

### Relationship between solubility and mass fraction of saturated solution

At a certain temperature, the mass of a solid substance dissolved when it reaches saturation in 100g solvent is called the solubility of this substance in this solvent. The mass fraction of solute in solution is the ratio of solute mass to solution mass. Solute mass fraction = solute mass / solution mass * 100% solubility = solute mass / solvent

### What is the difference between solubility and mass fraction? How to calculate the solubility?

Solubility refers to the mass of the most soluble substance in 100g water at a certain temperature
Mass fraction refers to the percentage of solute mass in solution mass
Calculation of solubility
In saturated solution, solute / solvent = s / 100

### What is the relationship between the solubility and mass fraction of substances? Let the solubility be s and the mass fraction be x%. Is x related to s?

For a saturated solution of the same solute at the same temperature:
S>C
C%＝S/(100+S)