Suppose we are dealing with calcium chloride as opposed to the chemical in the video. If a solution contains 70 g of calcium chloride per 100 g of water at 25 degrees Celsius, is the solution unsaturated, saturated, or supersaturated?
Not having seen the video I have no idea what you're talking about.
The solution is unsaturated. According to the chart, CaCl2 solubility is increased with increased in temperature and concentration increases with added solute. If the at 20 Celsius saturation is approximately 75 g per 100ml and 25 Celsius saturation is approximately 90 g per 100 ml, supersaturation is above the curve, then at 70 g per 100 ml is unsaturated since it is below the curve.
To determine whether the calcium chloride solution is unsaturated, saturated, or supersaturated, we need to compare the actual concentration of calcium chloride in the solution to its solubility at the given temperature.
Solubility is the maximum amount of solute that can dissolve in a solvent at a particular temperature. In this case, we are given the concentration of the solution, which is 70 g of calcium chloride per 100 g of water at 25 degrees Celsius.
To find the solubility of calcium chloride at 25 degrees Celsius, we can consult a solubility table or reference book. Let's assume that the solubility of calcium chloride at 25 degrees Celsius is 75 g per 100 g of water.
Now, comparing the actual concentration of 70 g calcium chloride per 100 g of water to the solubility of 75 g calcium chloride per 100 g of water, we can see that the solution is not saturated because it contains less calcium chloride than what is required to reach maximum solubility.
Therefore, the solution of calcium chloride is unsaturated at 25 degrees Celsius.