Rate

Stirring the solution increases the rate of dissolution (rate of dissolving).

• True

• False

The smaller the particle size the faster the rate of dissolution (rate of dissolving).

• True

• False

Which of the following statements is true about how using smaller salt crystals would affect the rate of making a salt solution in water?

• Smaller crystals increase the surface area and slow down dissolving.

• Smaller crystals decrease the surface area and speed up dissolving.

• Smaller crystals increase the surface area and speed up dissolving.

• Smaller crystals decrease the surface area and slow down dissolving.

Which of the following actions will NOT increase the rate of dissolution (dissolving) for solids?

• Stirring the solution

• Decreasing the temperature

• Increasing the surface area of the

  solute

• Increasing the temperature

Tags

NGSS.MS-PS3-4

Select the 3 properties that affect the rate of dissolving materials

• surface area

• volume

• temperature

• texture

• stirring

Jackson is making dinner and is trying to dissolve salt into a pot of water. The salt is dissolving slowly. What should Jackson do to speed up the rate of dissolving?

• He should put larger salt particles in the water.

• He should heat the water to a higher temperature.

• He should completely stop stirring the pot of water.

• He should slow down the speed he is stirring the pot.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Instead of speed, in science we use the term...

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Which is these would be a unit for rate?

• in

• mi

• m/s

• s

Tags

NGSS.MS-PS3-1

(blank) is how fast an object is moving

Tags

NGSS.MS-PS3-1

d/t is the equation that solves for...

• rate

• time

• distance