Question

The saturation temperature for $20 \cdot 7{\text{ g}}$ of $CuS{O_4}$ soluble in water is _______

Answer 1

Hint: The amount of a particular substance to be dissolved in the solvent depends upon the temperature. The temperature at which it gets completely dissolved in the solvent is a saturation temperature. One can think about the molecules of that substance and mass given and relate them to find out the saturation temperature.

Complete step by step answer:

1) First of all let us learn about the concept of saturation temperature in detail and how can we apply this to find out the temperature for the given compound. The saturation temperature can be defined as the temperature measured for its saturation pressure at which a liquid boils into its vapor phase.
2) Hence the liquid at this point can be said to be saturated with the thermal energy i.e. applied temperature. We can say that the saturation temperature is the boiling point.
3) Now that the solubility of copper sulfate is temperature-dependent that means if we increase the water temperature that will encourage more salts to dissolve in the solution making an increase in total concentration.
4) Therefore, a maximum of $20 \cdot 7{\text{ g}}$ copper sulphate can be dissolved in ${\text{100 g}}$ of water At ${\text{20}}$ degree Celsius and it will form a saturated solution at this temperature.
5) Hence, the correct statement will be The saturation temperature for $20 \cdot 7{\text{ g}}$ of $CuS{O_4}$ soluble in water is ${\text{20}}{{\text{ }}^\circ }{\text{C}}$.

Note:
As the solubility of most solids dissolved in water increases with increasing temperature. When a saturated solution is prepared at a higher temperature then contains more number of dissolved solutes than the number of dissolved solutes at a lower temperature. And when that solution is brought down to normal temperature it can become supersaturated.