The temperature at which crystal will first appear when a solution is cooled from 60°c to 20°c?
To determine the temperature at which crystal will first appear when a solution is cooled from 60°C to 20°C, you need to know the concept of solubility and saturation.
Solubility refers to the maximum amount of solute that can dissolve in a given amount of solvent at a specific temperature. As a solution cools, the solubility of most substances decreases. When the solubility decreases to a point where the concentration of the solute exceeds its solubility, crystals will begin to form.
To find the temperature at which crystal formation occurs, you need to determine the solubility of the solute at both 60°C and 20°C. Then, compare these values to see at which temperature the solute reaches its saturation point and crystals begin to form.
The solubility of a substance is typically given in grams of solute per 100 grams of solvent or per liter of solution. If you have the solubility values for the solute at 60°C and 20°C, you can determine the highest solubility value. The temperature at which this maximum solubility occurs is the temperature at which crystal formation begins.
It's important to note that the solubility of different substances varies greatly, so you'll need to consult solubility tables or reference books for the specific solute you are working with. Additionally, factors such as concentration, pressure, and impurities can affect the solubility, so taking them into account may be necessary for accurate results.