What is Solubility?
When a solute is able to dissolve into a solvent, it is called soluble. When a solute is not able to dissolve into a solvent, it is called insoluble. This occurs when the particles of the solute and solvent don't attract. It is possible that a solute is soluble in a specific solvent, and insoluble in another solvent. E.g. sugar is soluble in water, but insoluble in vegetable oil. This is due to the fact that sugar particles and vegetable oil particles don't attract.
A solution with a lot of solute in it, is a concentrated solution. A solution with little solute in it, is a dilute solution. Below is a picture of four glasses. All have approximately the same amount of solvent (water). But, they all have varied amounts of solute. The one on the left has the most amount of solute, and thus has a high concentration (amount of solute in a solution). As you move to the right, the amount of solute decreases, so the amount of concentration drops. The one on the far right has the least amount of solute, and thus has the least concentration.
A solution with a lot of solute in it, is a concentrated solution. A solution with little solute in it, is a dilute solution. Below is a picture of four glasses. All have approximately the same amount of solvent (water). But, they all have varied amounts of solute. The one on the left has the most amount of solute, and thus has a high concentration (amount of solute in a solution). As you move to the right, the amount of solute decreases, so the amount of concentration drops. The one on the far right has the least amount of solute, and thus has the least concentration.
Something else that can effect the concentration of a solution, is the amount of solvent. Say there are two cups beside one another. The cup to the left has 400ml, and the one to the right has 200ml. If you drop the same amount of solute in them, their concentration will still be different as the amount of water to spread in is different. So, the formula to calculate concentration is as follows:
1. Figure out the amount of solute you have in grams, and the total amount of solution you have
7g solute
75ml amount of solution
2. Now divide the amount of solution by 100
100/75=1.33(goes on forever)
3. Now multiply this number by your solute in grams
7x1.33=9.33
4. Now, this number is your concentration (grams of solute per 100ml solution)
OR
1. Figure out the amount of solute you have in grams, and the total amount of solution you have
7g solute
75ml amount of solution
2. Divide the amount of solute in grams by the amount of solution in ml
7/75=0.0933
3. Multiply this by 100 (as we are solving for 100ml)
0.0933x100=9.33
4. Now, this number is your concentration (grams of solute per 100ml solution)
A saturated solution is a solution which cannot dissolve any more solutes. A solution that is still able to dissolve more solute is known as a unsaturated solution.
To calculate the solubility (not to be confused with concentration, which is grams of solute/100ml solution), which is grams of solute per 100ml solvent, you calculate the maximum amount of solute that will dissolve in the solvent in grams per 100ml. The answer is the solubility at 20°.
1. Figure out the amount of solute you have in grams, and the total amount of solution you have
7g solute
75ml amount of solution
2. Now divide the amount of solution by 100
100/75=1.33(goes on forever)
3. Now multiply this number by your solute in grams
7x1.33=9.33
4. Now, this number is your concentration (grams of solute per 100ml solution)
OR
1. Figure out the amount of solute you have in grams, and the total amount of solution you have
7g solute
75ml amount of solution
2. Divide the amount of solute in grams by the amount of solution in ml
7/75=0.0933
3. Multiply this by 100 (as we are solving for 100ml)
0.0933x100=9.33
4. Now, this number is your concentration (grams of solute per 100ml solution)
A saturated solution is a solution which cannot dissolve any more solutes. A solution that is still able to dissolve more solute is known as a unsaturated solution.
To calculate the solubility (not to be confused with concentration, which is grams of solute/100ml solution), which is grams of solute per 100ml solvent, you calculate the maximum amount of solute that will dissolve in the solvent in grams per 100ml. The answer is the solubility at 20°.