If the solubility of a particular solute is at 20C, which of the following concentrations would represent a supersaturated solution of that solute?

Question

BlackTom AI · Accepted Answer

To tackle this, we first restate the setup: the solubility of the solute is given at 20°C, and we are asked which listed concentration scenario would correspond to a supersaturated solution of that solute.

Option 1: at 25°C. The solubility at 25°C (if known) would generally be different from that at 20°C, often higher for many solutes. A supersaturated solution at 25°C would require a concentration exceeding the 25°C solubility, not necessarily exceeding the 20°C solubility. Since the question specifies the solubility is defined at 20°C, this option does not directly link a concentration to being supersaturated relative to 20°C. It could be supersaturated at 25°C if the concentration exceeds 25°C solubility, but we are not given that value here.

Option 2: at 15°C. Similar logic applies: a supersaturated state at 15°C would require a concentration greater than the 15°C solubility. We do not have that solubility value, so we cannot assert supersaturation relative to 15°C from the information given. This option does not clearly indicate supersaturation with respect to the 20°C reference.

Option 3: at 20°C. Since the solubility is defined at 20°C, a solution measured at 20°C would be at the solubility equilibrium if its concentration matches the 20°C solubility. A supersaturated state at 20°C would require the concentration to exceed the 20°C solubility value. However, the question provides no explicit concentration value, only a temperature context, making interpretation tricky. If we interpret “concentration representing supersaturation” as a scenario where the conditions match the temperature at which supersaturation is assessed, then 20°C is the temperature corresponding to the solubility value against which supersaturation would be judged.

Option 4: at 20°C. This duplicate option repeats the same reasoning as Option 3, with identical implications.

In summary, without explicit concentrations, the only temperature tied directly to the defined solubility is 20°C, making it the reference point for judging supersaturation conditions relative to the given solubility at 20°C. The other temperatures would require their own solubility values to determine supersaturation accurately, which are not provided here.

If the solubility of a particular solute is at 20C, which of the following concentrations would represent a supersaturated solution of that solute?

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