To determine which of the solutions can be identified as saturated, we need to compare the amounts of solute dissolved in the given solvent (100 grams of water) at the specified temperatures with the solubility values obtained from the provided graphs for potassium and sodium salts.
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A. 40 grams of KCl dissolved in 100 grams of water at 40 °C
- We need the solubility of KCl at 40 °C. (Assuming that the solubility graph for KCl shows ~30-35 grams per 100 grams of water at 40 °C.)
- Since 40 grams is greater than the solubility, this solution is saturated.
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B. 40 grams of NaCl dissolved in 100 grams of water at 50 °C
- We need the solubility of NaCl at 50 °C. (Assuming the solubility graph for NaCl shows ~35-40 grams per 100 grams of water at 50 °C.)
- Since 40 grams is approximately equal to or slightly greater than the solubility, this solution is likely saturated.
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C. 70 grams of KNO3 dissolved in 100 grams of water at 50 °C
- We need the solubility of KNO3 at 50 °C. (Assuming the solubility of KNO3 at this temperature is around 60-70 grams per 100 grams of water.)
- Since 70 grams equals the solubility, this solution is saturated.
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D. 70 grams of NaNO3 dissolved in 100 grams of water at 0 °C
- We need the solubility of NaNO3 at 0 °C. (Assuming the solubility of NaNO3 at this temperature is around 30-40 grams per 100 grams of water.)
- Since 70 grams is significantly greater than the solubility, this solution is saturated.
From this analysis, the following options contain saturated solutions:
- A: 40 grams of KCl at 40 °C
- B: 40 grams of NaCl at 50 °C
- C: 70 grams of KNO3 at 50 °C
- D: 70 grams of NaNO3 at 0 °C
Thus the answer would be:
All Solutions Are Saturated: A, B, C, and D, depending on graph information.
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