Which is not true about solubility?
A. The higher the temperature, the faster a solute can be dissolved in a solvent
B. The nature of the solute and the amount of solvent also determine how fast the solute dissolves in a solvent.
C. The size of the particles affects the dissolving process. The finer the particles are, the faster the solute dissolves D. The manner of stirring is not a factor in dissolving a solute in a solvent.
The correct answer and explanation is:
The correct answer is D. The manner of stirring is not a factor in dissolving a solute in a solvent.
Explanation:
Solubility refers to how well a solute can dissolve in a solvent, and it depends on several factors. Let’s break down the options:
A. The higher the temperature, the faster a solute can be dissolved in a solvent.
This statement is true. Generally, increasing the temperature causes the particles of the solvent to move faster. This increases the rate at which the solute dissolves because the solvent molecules are more energetic and can interact with the solute more quickly.
B. The nature of the solute and the amount of solvent also determine how fast the solute dissolves in a solvent.
This is true. The chemical nature of the solute (whether it is ionic, molecular, etc.) can affect its solubility. Additionally, the amount of solvent plays a role; if there is more solvent, the solute can dissolve more easily, assuming the solute isn’t already saturated.
C. The size of the particles affects the dissolving process. The finer the particles are, the faster the solute dissolves.
This is true. Smaller particles have a greater surface area exposed to the solvent. A larger surface area allows the solvent to interact with more solute molecules at once, speeding up the dissolving process. This is why powdered substances dissolve faster than larger chunks of the same material.
D. The manner of stirring is not a factor in dissolving a solute in a solvent.
This statement is false. The manner of stirring significantly affects the rate at which a solute dissolves. Stirring helps distribute the solute particles throughout the solvent more evenly, increasing contact between the solute and solvent molecules. Without stirring, the dissolving process would be slower because the solute would be surrounded by a concentrated layer of solvent that could hinder further dissolution.
In conclusion, the manner of stirring plays an important role in the rate of dissolution, making statement D incorrect.