Selective Precipitation of Ions Explained

What is the main topic covered in this video?

• Precipitation and separation of ions

• Acid-base reactions

• Thermodynamics

• Electrochemistry

What does it mean if Q is greater than Ksp?

• The solution is unsaturated

• No change will happen

• The reaction will shift right

• Precipitation will occur

If Q equals Ksp, what is the state of the solution?

• Supersaturated

• Dilute

• Saturated

• Unsaturated

What happens when Q is less than Ksp?

• The reaction shifts left

• More solid dissolves

• Precipitation occurs

• The solution becomes supersaturated

What is selective precipitation?

• Removing all ions from a solution

• Adding more solute to a solution

• Removing one metal ion from a solution of multiple metal ions

• Diluting a solution

Which ion will precipitate first in a solution containing multiple ions?

• The ion with the lowest Ksp

• The ion with the lowest concentration

• The ion with the highest concentration

• The ion with the highest Ksp

In the example of selective precipitation, why does AgCl precipitate before Cu2+?

• Cu2+ is more soluble

• Cu2+ has a lower Ksp

• AgCl is more soluble

• AgCl has a higher Ksp

What is the Ksp value of copper sulfide (CuS)?

• 2 x 10^-37

• 6 x 10^-37

• 2 x 10^-25

• 6 x 10^-25

What color is the solution after CuS is removed and only Zn2+ remains?

• Green

• Black

• White

• Colorless

Which figure in the book shows selective precipitation at the particle level?

• Figure 17.22

• Figure 17.17

• Figure 17.23

• Figure 17.16