If adding of a crystal of the solute to an aqueous solution causes many particles to come out of the solution, the original solution was ____.

Question

BlackTom AI · Accepted Answer

In this question, we are considering what it means when adding a crystal of the solute to an aqueous solution causes many particles to come out of the solution.
Option 1: unsaturated. An unsaturated solution can still dissolve more solute at the given conditions, so adding more solute would ordinarily continue to dissolve rather than precipitate, making this option inconsistent with the observed precipitation.
Option 2: saturated. A saturated solution is at equilibrium with dissolved solute, and adding more solute typically does not cause a large amount to precipitate unless a seed crystal disrupts the balance; however, a clean release of many particles upon addition points to a supersaturation scenario rather than a simple saturated state.
Option 3: an emulsion. Emulsions involve two immiscible liquids forming dispersed droplets, not a solid precipitate from a solute in water. This choice misapplies the concept entirely to a solid solute in an aqueous medium, so it is incorrect.
Option 4: supersaturated. A supersaturated solution contains more dissolved solute than can be held in solution at the given temperature and pressure. Introducing a crystal provides a nucleus that triggers rapid precipitation of the excess solute, which aligns with the observed many particles coming out of solution.
In summary, the precipitation of many particles after adding a crystal is best explained by the solution being in a supersaturated state, while the other options fail to account for this precipitation behavior or describe an unrelated scenario.

If adding of a crystal of the solute to an aqueous solution causes many particles to come out of the solution, the original solution was ____.

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