Solubility Curves

Copper (II) sulfate is more soluble in water than potassium sulfate.  What does soluble mean?

• Soluble means that the copper (II) sulfate was able to dissolve in the water. 

• Soluble means that the copper (II) sulfate was NOT able to dissolve in the water. 

Remember: When substances (like salts)  dissolve in liquids (like water) a solution is formed. 

When copper (II) sulfate is dissolved in water, what is the SOLUTE?

 

• copper (II) sulfate

• water

Remember: When substances (like salts)  dissolve in liquids (like water) a solution is formed. 

When copper (II) sulfate is dissolved in water, what is the SOLVENT (the substance doing the dissolving)?

 

• water

• copper (II) sulfate

True or False: Solubility is a physical property of a substance.

• True

• False

How is the solubility of a substance affected by temperature? (hint: follow and read the X-axis in relation to the curve)

 

• The solubility of a substance increases as temperature rises.

• The solubility of a substance increases as temperature decreases.

• The solubility of a substance decreases as the temperature rises

Tags

NGSS.MS-PS1-4

What is the label on the X axis for this solubility curve?

• grams salt per 100g H2O

• temperature in degrees Celsius

• K₂SO₄

• CuSO₄

• L3-3T

Tags

NGSS.MS-PS1-4

What is the label on the Y axis for this solubility curve?

• g salt per 100g H₂O

• temperature in Celcius 

• K₂SO₄

• CuSO₄

• K-2SO

Look at the graph.

Select the TRUE statement.

 

• The graph shows that potassium sulfate (K₂SO₄) is LESS soluble than CuSO₄ because its line is the lowest on the graph.

• The graph shows that potassium sulfate (K₂SO₄) is MORE soluble than CuSO₄ because its line is the lowest on the graph.

At 90^oC, ______ of copper (II) sulfate will dissolve in 100g of H₂O

• approximately 68g

• approximately 44g

• approximately 91g

Tags

NGSS.MS-PS1-4

At the same temperature, approximately how many grams of Potassium Sulfate (K₂SO₄) would be soluble in 100g of water?

• 24 grams

• 90 grams