Dissolving

What plays a large part in how fast a substance dissolves?

• Pressure

• Temperature

• Stirring

• Surface area

What happens when more solute particles come into contact with the solvent?

• Evaporation occurs

• The solution becomes denser

• The solution becomes cloudy

• The rate of dissolving increases

Why does sugar dissolve faster in hot water?

• Because it becomes lighter

• Because it becomes colder

• Because highly energized particles can break chemical bonds more easily

• Because it becomes denser

What increases the rate of dissolving?

• Decreasing the surface area

• Decreasing the stirring

• Decreasing the temperature

• Increasing the surface area

What is the best way to demonstrate the concept of surface area to learners at this level?

• Using grains of different sizes

• Using a thermometer

• Using a ruler

• Using a magnet

What factors affect the rate of dissolving?

• Pressure and temperature

• Stirring and surface area

• Temperature and surface area

• Pressure and stirring

How does the temperature of the solvent impact the rate of dissolving?

• Higher temperature slows down the dissolving process

• Lower temperature speeds up the dissolving process

• Higher temperature speeds up the dissolving process

• Lower temperature has no impact on the dissolving process

What role does agitation play in the process of dissolving?

• Agitation has no effect on dissolving

• Agitation increases the rate of dissolving

• Agitation decreases the rate of dissolving

• Agitation changes the color of the solution