@20*C solubility - 22g CuSO4 / 100g H2O
@40*C solubility - 42g CuSO4 / 100g H2O
which is saturated and unsaturated
a. @20*C is 6g CuSO4 / 25g H2O
b. @20*C is 30g CuSO4 / 150g H2O
c. @40*C is 99g CuSO4 / 250g H2O
please show work thanks
You need to change all of these to g/100 g H2O.
a. 6g CuSO4 x (100 gH2O/25g H2O) = 24 g CuSO4/100 g H2O. At 20 C the solubility is 22 g/100 g; therefore, it is saturated.
To determine if a solution is saturated or unsaturated, we need to compare the solubility of the solute (CuSO4) at a given temperature with the actual amount of solute dissolved in the solvent (H2O) at that temperature.
Given solubilities:
- @20°C: Solubility = 22g CuSO4 / 100g H2O
- @40°C: Solubility = 42g CuSO4 / 100g H2O
Now, let's analyze the options:
a. @20°C: 6g CuSO4 / 25g H2O
The solubility at 20°C is 22g CuSO4 / 100g H2O. Since 6g CuSO4 is less than 22g CuSO4, this represents a saturated solution.
b. @20°C: 30g CuSO4 / 150g H2O
Again, we compare the solubility (22g CuSO4) with the given amount (30g CuSO4). Since 30g CuSO4 is more than 22g CuSO4, this represents a supersaturated solution, not just saturated.
c. @40°C: 99g CuSO4 / 250g H2O
For 40°C, the solubility is 42g CuSO4. The given amount (99g CuSO4) is greater than the solubility, so it also represents a supersaturated solution, not just saturated.
To summarize:
- Option a represents a saturated solution.
- Options b and c represent supersaturated solutions.
Remember, a saturated solution contains the maximum amount of solute that can dissolve in a given amount of solvent at a particular temperature. A supersaturated solution contains more solute than can normally dissolve at a given temperature; it is a metastable state that is usually created through specific processes.