Final answer:
Sodium chloride (NaCl) has the least change in solubility with temperature changes, compared to other options like potassium nitrate, glucose, and ammonium chloride.
Step-by-step explanation:
The question asks which compound has its solubility change the least when the temperature changes. Among the options provided, sodium chloride (NaCl) has the least temperature-dependent solubility curve, indicating that its solubility changes minimally with temperature fluctuations, particularly compared to compounds like potassium nitrate (KNO3), which has a steep curve illustrating a dramatic increase in solubility with rising temperature.
For example, the solubility of sodium chloride in water is fairly consistent, with 36.0 g per 100 g of water at 20°C, and it does not change dramatically with temperature as other salts might. This principle is an essential concept in Chemistry, affecting processes like fractional crystallization used in mixture separation based on component solubilities at different temperatures.