7.6E Rate of Dissolution

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

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

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

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

Tags

NGSS.MS-PS1-4

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-PS1-2

NGSS.MS-PS1-4

What is a substance that is dissolved in another substance? 

• solution
• solute
• solvent
• compound