Solute Chemistry Example 4

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Example 4

hard
At 20°C20°\text{C}, the maximum solubility of NaCl\text{NaCl} in water is 36 g36 \text{ g} per 100 mL100 \text{ mL}. If a student adds 50 g50 \text{ g} of NaCl\text{NaCl} to 100 mL100 \text{ mL} of water at 20°C20°\text{C}, what happens? Calculate how much solute dissolves and how much remains undissolved.

Solution

  1. 1
    Maximum dissolved: 36 g36 \text{ g} of NaCl\text{NaCl} can dissolve in 100 mL100 \text{ mL} of water at 20°C20°\text{C}.
  2. 2
    Undissolved: 50−36=14 g50 - 36 = 14 \text{ g} of NaCl\text{NaCl} remains as solid at the bottom.
  3. 3
    The solution is saturated — it contains the maximum amount of dissolved solute at that temperature. The extra 14 g14 \text{ g} is excess solute.

Answer

36 g dissolves, 14 g remains undissolved (saturated solution).36 \text{ g dissolves, } 14 \text{ g remains undissolved (saturated solution).}
A saturated solution has dissolved the maximum amount of solute at a given temperature. Any additional solute beyond the solubility limit remains undissolved.

About Solute

The substance that is dissolved in a solution, typically present in a smaller amount than the solvent.

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More Solute Examples

Example 1 easy

In a solution of sugar dissolved in water, identify the solute and explain its role.

Example 2 medium

In carbonated water, [formula] gas is dissolved in water. Identify the solute and solvent, and expla

Example 3 easy

In a saline solution (salt water), what is the solute?

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