Question

Which of the salts has greater change in solubility in kg/litre of water between 15$^\circ$C and 25$^\circ$C?

• A. Potassium Chlorate
• B. Potassium Nitrate
• C. Sodium Chlorate
• D. Sodium Nitrate

Hint:

When comparing changes, focus on the numerical difference between final and initial values in the range specified — not the percentage change unless specifically asked.

Answer 1

The Correct Option is B

From the graph: - Potassium Chlorate (♦): increases from about 0.05 kg/L to about 0.07 kg/L → change ≈ 0.02 kg/L.
- Potassium Nitrate (▲): increases from about 0.22 kg/L to about 0.32 kg/L → change ≈ 0.10 kg/L.
- Sodium Chlorate (✳): increases from about 0.85 kg/L to about 0.92 kg/L → change ≈ 0.07 kg/L.
- Sodium Nitrate (●): increases from about 0.82 kg/L to about 0.88 kg/L → change ≈ 0.06 kg/L.
Clearly, Potassium Nitrate shows the greatest change in solubility over this 10°C range.