To calculate solubility, you will need to know the amount of solute that can dissolve in a given amount of solvent at a specific temperature. Solubility is usually expressed in grams of solute per 100 grams of solvent.
Here is an example of how to calculate solubility:
Example: Calculate the solubility of sodium chloride (NaCl) in water at 25°C. The solubility of NaCl is 36 grams per 100 grams of water at this temperature.
Step 1: Determine the mass of solute that can dissolve in the given amount of solvent. In this case, the solubility of NaCl is 36 grams per 100 grams of water.
Step 2: Calculate the solubility in terms of mass/volume if needed. For example, if you want to find the solubility in grams per liter (g/L), you can convert the given value by multiplying it by 10 (since 100 grams of water is equivalent to 1000 mL or 1 liter).
Step 3: Use the formula for solubility to calculate the amount of solute that can dissolve in the given amount of solvent at the specified temperature. The formula is:
Solubility = mass of solute / mass of solvent x 100%
For the example given, the solubility of NaCl in water at 25°C is 36 grams per 100 grams of water. This can be calculated as:
Solubility = 36g / 100g x 100%
Solubility = 36%
So, the solubility of sodium chloride in water at 25°C is 36%.