Question

a student hypothesizes that the solubility of a particular solute in water is nearly constant as temperature varies. the student can best test the hypothesis by doing which of the following?
○ drawing diagrams of the molecular structures of water and of the solute
○ researching the chemical properties of many different solutes
○ measuring the solubility of the solute at five different temperatures
○ measuring the solubility of several different solutes at a fixed temperature

Explanation:

To test the hypothesis about the solubility of a particular solute in water being nearly constant with temperature change, we need to measure the solubility of that specific solute at different temperatures.

• Option 1 (drawing molecular structures) doesn't test solubility vs temperature.
• Option 2 (researching other solutes' properties) is not about the specific solute's solubility with temperature.
• Option 3 (measuring solubility of the solute at five different temperatures) directly tests how solubility changes with temperature for the specific solute, which matches the hypothesis.
• Option 4 (measuring different solutes at a fixed temperature) doesn't address temperature variation for the specific solute.

Answer:

C. Measuring the solubility of the solute at five different temperatures