Factors Influencing Solute Dissolving Rates

The video explains how solute and solvent interactions affect the rate of dissolving. It covers three main factors: temperature, agitation, and surface area. Higher temperatures increase the movement of solvent molecules, leading to faster dissolving. Agitation, such as stirring, brings fresh solvent into contact with the solute, enhancing the dissolving process. Lastly, a greater surface area of the solute allows more contact with the solvent, speeding up dissolving. These factors are illustrated with examples like sugar dissolving in coffee.

What is necessary for a solute to dissolve in a solvent?

• The solvent must be a liquid.

• The solute and solvent must be the same temperature.

• The solute particles must be larger than the solvent particles.

• The solute and solvent particles must interact.

How does temperature generally affect the rate of dissolving for most solid solutes?

• It only affects gaseous solutes.

• It has no effect on the rate of dissolving.

• It increases the rate of dissolving.

• It decreases the rate of dissolving.

Why do solvent molecules dissolve solutes more quickly at higher temperatures?

• They change color.

• They move faster and collide more often with solute molecules.

• They become larger in size.

• They become less dense.

What effect does agitation have on the rate of dissolving?

• It only affects the temperature of the solvent.

• It has no effect on the rate of dissolving.

• It decreases the rate of dissolving.

• It increases the rate of dissolving by bringing fresh solvent into contact with the solute.

How does stirring a mixture affect the dissolving process?

• It decreases the temperature of the solvent.

• It prevents the solute from dissolving.

• It brings fresh solvent into contact with the solute, speeding up dissolving.

• It changes the color of the solution.

What is the relationship between surface area and the rate of dissolving?

• Surface area has no effect on dissolving.

• More surface area exposed leads to faster dissolving.

• Smaller surface area speeds up dissolving.

• Larger surface area slows down dissolving.

Why does granular sugar dissolve faster than a sugar cube?

• Sugar cubes are denser.

• Granular sugar is sweeter.

• Granular sugar has more surface area exposed to the solvent.

• Granular sugar is less dense.

Which of the following factors does NOT affect the rate of dissolving?

• Agitation

• Temperature

• Surface area

• Color of the solute