Rate of Dissolution 7.6E

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

• True

• False

True or False

The rate of dissolving of a solute in a solvent is faster when the solute and solvent are stirred.

• True

• False

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

What combination would dissolve a solid solute the fastest?

• high temperature, no stirring

• no heat, no stirring

• sugar cube, no heat

• high temperature, stirring

Tags

NGSS.MS-PS1-4

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

• True

• False

The sugar cubes are called the

• solute

• solvent

The water is called the

• solvent

• solute

Anna filled a ​cup with hot tea. Then she added a sugar cube. ​Which of these will help to make the sugar cube dissolve more quickly? 

• stirring the hot tea
• adding more sugar cubes
• adding ice to the tea
• pouring more tea into the cup

Ernesto and Amanda fill two cups with water. They use hot water in one cup and cold water in the other cup. Next, they will stir a spoon of salt into each cup.     

In which cup will the salt dissolve more slowly? 

• The salt will not dissolve in either cup
• The salt dissolves more slowly in the hot water
• The salt dissolves more slowly in the cold water
• The salt dissolves at the same speed in both cups

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What is a substance that is dissolved in another substance? 

• solution
• solute
• solvent
• compound