Concentration change - Potassium ferricyanide experiment

The video tutorial explains the formation of potassium ferrous cyanide through an experiment involving potassium thiocyanide and ferric nitrate. The reaction results in a color change from pale yellow to deep red due to the formation of potassium ferric thiocyanide. The process is an equilibrium reaction, and the video details how removing ferric ions or adding thiocyanide ions affects the equilibrium, causing color changes. The tutorial also covers the restoration of equilibrium and the chemical reactions involved.

What color change is observed when potassium thiocyanide is added to ferric nitrate?

• The solution turns blue.

• The solution turns deep red.

• The solution turns green.

• The solution turns purple.

What is the role of oxalic acid in the equilibrium reaction involving ferric ions?

• It removes ferric ions from the mixture.

• It stabilizes the thiocyanide ions.

• It turns the solution blue.

• It increases the concentration of ferric ions.

How does the removal of ferric ions affect the chemical equilibrium?

• It causes the solution to turn green.

• It leads to the formation of a new compound.

• It creates stress and disturbs the equilibrium.

• It has no effect on the equilibrium.

What happens when the concentration of thiocyanide ions increases in the solution?

• The solution turns blue.

• A forward reaction occurs, forming an iron complex ion.

• The solution becomes colorless.

• The equilibrium remains unchanged.

What is the final color of the solution when potassium thiocyanide is added to ferric nitrate?

• Bright green

• Dark red

• Light blue

• Pale yellow