Rate of Dissolving

When we lower the temperature of the liquid, the rate of dissolving of the solid will

• decrease

• increase

• stay the same

Tags

NGSS.MS-PS1-4

Which of the following WILL NOT increase the rate that a sugar cube dissolves?

• Crushing up the sugar cube
• Mixing the cube as you stir
• heating up the water before mixing in the sugar
• adding an additional solute to the solution

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What will allow more solute to be dissolved in a solvent.

• adding more solute
• evaporation
• cooling solution
• heating solution

Tags

NGSS.MS-PS1-4

A student designed an investigation to test how stirring would affect how sugar dissolves. Her experimental design is shown in image. What is manipulated (or independent) variable in this investigation?

• amount of water
• stirred or not stirred
• time
• temperature

If Jane wants to design an experiment to determine whether the size of the sugar particles affect the rate of dissolving, what variables should she use?

• water with 3 different temperatures

• sugar in 3 different sizes

• 3 different stirring speeds

• all of the above

Tags

NGSS.MS-PS1-4