Question

1. fill in the missing information in the table below. note: all solutions are formed from 100 ml of water

solution	saturated or unsaturated	if saturated: how much more solute can dissolve in the solution?
a solution that contains 50 g of nh₄cl at 50 °c
a solution that contains 20 g of kclo₃ at 50 °c
a solution that contains 70 g of ki at 0 °c

Explanation:

To solve this, we need the solubility values of each solute at the given temperatures (from solubility tables):

1. Solution: A solution that contains 70 g of $\ce{NaNO3}$ at $30^\circ\mathrm{C}$

• Solubility of $\ce{NaNO3}$ at $30^\circ\mathrm{C}$: ~96 g/100 mL water.
• Since $70\ \text{g} < 96\ \text{g}$, the solution is unsaturated.
• No additional solute can dissolve (not saturated).

2. Solution: A solution that contains 50 g of $\ce{NH4Cl}$ at $50^\circ\mathrm{C}$

• Solubility of $\ce{NH4Cl}$ at $50^\circ\mathrm{C}$: ~50 g/100 mL water.
• Since $50\ \text{g} = 50\ \text{g}$, the solution is saturated.
• No more solute can dissolve (already saturated).

3. Solution: A solution that contains 20 g of $\ce{KClO3}$ at $50^\circ\mathrm{C}$

• Solubility of $\ce{KClO3}$ at $50^\circ\mathrm{C}$: ~18 g/100 mL water.
• Since $20\ \text{g} > 18\ \text{g}$, the solution is saturated (excess solute undissolved).
• Additional solute that can dissolve: $18 - 20 = -2$ (but since it’s saturated, no more can dissolve; excess is undissolved). Wait, correction: If solubility is 18 g, then at saturation, only 18 g dissolves. So the solution is saturated (with undissolved solute), and no more can dissolve (already at max, with excess).

4. Solution: A solution that contains 70 g of $\ce{KI}$ at $0^\circ\mathrm{C}$

• Solubility of $\ce{KI}$ at $0^\circ\mathrm{C}$: ~128 g/100 mL water.
• Since $70\ \text{g} < 128\ \text{g}$, the solution is unsaturated.
• No additional solute limit reached (can dissolve more).

Filled Table (Summarized):

Solution	Saturated or Unsaturated	If Saturated: How much more solute can dissolve?
$\ce{NH4Cl}$ (50 g, $50^\circ\mathrm{C}$)	Saturated	0 g (already saturated)
$\ce{KClO3}$ (20 g, $50^\circ\mathrm{C}$)	Saturated	0 g (excess undissolved; max is 18 g)
$\ce{KI}$ (70 g, $0^\circ\mathrm{C}$)	Unsaturated	None (unsaturated)

(Note: Solubility values are approximate from standard solubility curves. Adjust if precise values differ.)

Answer:

To solve this, we need the solubility values of each solute at the given temperatures (from solubility tables):

1. Solution: A solution that contains 70 g of $\ce{NaNO3}$ at $30^\circ\mathrm{C}$

• Solubility of $\ce{NaNO3}$ at $30^\circ\mathrm{C}$: ~96 g/100 mL water.
• Since $70\ \text{g} < 96\ \text{g}$, the solution is unsaturated.
• No additional solute can dissolve (not saturated).

2. Solution: A solution that contains 50 g of $\ce{NH4Cl}$ at $50^\circ\mathrm{C}$

• Solubility of $\ce{NH4Cl}$ at $50^\circ\mathrm{C}$: ~50 g/100 mL water.
• Since $50\ \text{g} = 50\ \text{g}$, the solution is saturated.
• No more solute can dissolve (already saturated).

3. Solution: A solution that contains 20 g of $\ce{KClO3}$ at $50^\circ\mathrm{C}$

• Solubility of $\ce{KClO3}$ at $50^\circ\mathrm{C}$: ~18 g/100 mL water.
• Since $20\ \text{g} > 18\ \text{g}$, the solution is saturated (excess solute undissolved).
• Additional solute that can dissolve: $18 - 20 = -2$ (but since it’s saturated, no more can dissolve; excess is undissolved). Wait, correction: If solubility is 18 g, then at saturation, only 18 g dissolves. So the solution is saturated (with undissolved solute), and no more can dissolve (already at max, with excess).

4. Solution: A solution that contains 70 g of $\ce{KI}$ at $0^\circ\mathrm{C}$

• Solubility of $\ce{KI}$ at $0^\circ\mathrm{C}$: ~128 g/100 mL water.
• Since $70\ \text{g} < 128\ \text{g}$, the solution is unsaturated.
• No additional solute limit reached (can dissolve more).

Filled Table (Summarized):

Solution	Saturated or Unsaturated	If Saturated: How much more solute can dissolve?
$\ce{NH4Cl}$ (50 g, $50^\circ\mathrm{C}$)	Saturated	0 g (already saturated)
$\ce{KClO3}$ (20 g, $50^\circ\mathrm{C}$)	Saturated	0 g (excess undissolved; max is 18 g)
$\ce{KI}$ (70 g, $0^\circ\mathrm{C}$)	Unsaturated	None (unsaturated)

(Note: Solubility values are approximate from standard solubility curves. Adjust if precise values differ.)