Factors That Affect Dissolving

Which has more surface area exposed to the solvent and will dissolve faster in water: a crushed candy cane or a whole candy cane?

• The whole candy cane, because it is larger.

• Both will dissolve at the same rate, as surface area doesn’t matter.

• The crushed candy cane, because it has smaller pieces with more surface area exposed.

• The whole candy cane, because it has less surface area exposed.

When a mixture is stirred, the solute and solvent collide, which increases the ___________

• rate of dissolution

• standard rate

• surface area

• agitation

When the ___________________ is decreased, the amount of particles available to collide with the solvent decreases.

• space

• temperature

• reaction rate

• surface area

Answer explanation

Surface area is the amount of an object's space that is on the outside.

Tags

NGSS.MS-PS3-4

Increasing or decreasing the temperature will affect the speed of particle movement and change the dissolving rate.

• TRUE

• FALSE

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

A solute and solvent must collide to interact, which will increase the dissolution rate.

• TRUE

• FALSE

What effect does cooling have on the rate of dissolution?

• increase the rate of dissolution

• decrease the rate of dissolution

• has no effect on the rate of dissolution.

• It causes the solute to sink to the bottom.

Tags

NGSS.MS-PS1-4

What happens when you add more solute to a solution?

• The solution becomes more diluted.

• The solution evaporates.

• The solution becomes more concentrated.

• The solvent becomes the solute.

To make an ____________, a solute is placed in water and dissolves, dispersing evenly within the water.

• dilution

• aqueous solution

• concentration

• solvent

Tags

NGSS.MS-PS1-2

Which factor increases the rate of dissolving by increasing the kinetic energy of the particles?

• Increasing the temperature

• Decreasing the temperature

• Adding more solute

• Using a larger container

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

How does stirring a solution affect the dissolving process?

• It decreases the rate of dissolution

• It increases the rate of dissolution

• It has no effect on the rate of dissolution

• It causes the solute to settle at the bottom