Equilibrium Shift in Cobalt Chloride

The video tutorial explores the shift in equilibrium between Co H2O whole 6 2+ and Cl- ions by altering the concentration of these ions. It details the materials required, the procedure for adding water and Cl- ions, and the resulting color changes. The chemistry behind the reactions is explained, highlighting the role of chlorine ions in displacing water from the cobalt complex. Safety precautions for handling chemicals are also discussed.

What is the primary aim of studying the equilibrium shift in the reaction involving cobalt chloride and chloride ions?

• To observe the color change in the solution

• To determine the concentration of cobalt ions

• To study the effect of temperature on the reaction

• To analyze the shift in equilibrium by changing ion concentration

Which material is NOT required for the experiment on equilibrium shift?

• Acetone

• Test tubes

• Measuring cylinder

• Sodium chloride

In the experiment with water, what is used as the reference test tube?

• Test tube A

• Test tube E

• Test tube B

• Test tube D

What is the observed color change when water is added to the cobalt chloride solution?

• Blue to green

• Pink to blue

• Blue to pink

• Pink to light blue

How much concentrated HCl is added to test tube C in the chloride ion experiment?

• 1.0 mL

• 0.5 mL

• 2.0 mL

• 1.5 mL

What is the final color change observed when HCl is added to the cobalt chloride solution?

• Blue to pink

• Blue to light blue

• Pink to light blue

• Pink to green

What causes the color change from pink to light blue in the cobalt chloride solution?

• Chlorine ions forcing water out of the complex

• Addition of water

• Increase in temperature

• Decrease in pressure

What is the role of cobalt ions in the solution?

• They act as a catalyst

• They are hydrated and give a pink color

• They increase the solution's temperature

• They decrease the solution's pH

Which precaution is NOT necessary during the experiment?

• Use of distilled water

• Using concentrated HCl carefully

• Handling acetone with care

• Wearing gloves

Why is it important to handle acetone with care?

• It is flammable

• It is reactive with water

• It is corrosive

• It is toxic