Materials Required 

• Conical flask (100 ml)
• Beaker
• Test tubes
• Test tube stand
• Measuring cylinders 
• Distilled Water
• Acetone
• Concentrated hydrochloric acid: 30 mL
• Cobalt Chloride solution (60mL of Acetone + 0.600 g of Cobalt Chloride)

The Procedure

Real Lab Procedure

• Take 5 test-tubes labelled as A, B, C, D, and E. 
• Add 3mL of Cobalt Chloride solution to each test tube. 
• Add 1mL, 0.8mL, 0.6mL, 0.4mL and 0.2mL Acetone to test tubes A, B, C, D and E respectively. 
• Then add 0.2mL, 0.4mL, 0.6mL, 0.8mL of water to test tubes B, C, D and E respectively. 
• Now compare the intensity of the colours in the test tubes B, C, D and E with the blue colour in test tube A taken as the reference test tube. 
• Take 10 mL of Cobalt Chloride solution in test tube X and add 5 mL distilled water to it, i.e., A solution of pink colour can be observed. 
• Take 1.5mL of this solution in 5 different test tubes labelled as A, B, C, D and E. 
• Add 2mL, 1.5mL, 1mL and 0.5mL of water to test tubes A, B, C and D. 
• Add 0.5mL, 1mL, 1.5mL, 2mL and 2.5mL conc. HCl to test tubes A, B, C, D and E respectively.
• Now compare the intensity of the colours in the test tubes A, B, C, D and E with the pink colour in test tube X taken as the reference test tube. 

Simulator Procedure 

• Drag and drop 3ml of Cobalt Chloride solution to test tube A. 
• Repeat the step 1 for test tubes B, C, D, E, respectively. 
• Click on the cap of the Acetone bottle to open it. 
• Drag and drop 1 ml of Acetone to test tube A. 
• Show an alert “Handle Acetone with care since it is flammable."
• Shows colour of the solution inside test tube A as blue. 
• Drag and drop 0.8 ml of Acetone to test tube B. 
• Drag and drop 0.6 ml of Acetone to test tube C. 
• Drag and drop 0.4 ml of Acetone to test tube D. 
• Drag and drop 0.2 ml of Acetone to test tube E. 
• Drag and drop 0.2 ml of water to test tube B. 
• Shows colour of the solution in test tube B changes to pink. 
• Drag and drop 0.4 ml of water to test tube C. 
• Shows colour of the solution in test tube C changes to pink. 
• Drag and drop 0.6 ml of water to test tube D. 
• Shows colour of the solution in test tube D changes to pink. 
• Drag and drop 0.8 ml of water to test tube E. 
• Shows colour of the solution in test tube E changes to pink. 
• Shows an inference “Addition of H₂O results in the formation of Pink colour.” 
• Shows next button and click on the Next button.
• Drag and drop 10 mL of Cobalt Chloride solution in test tube X. 
• Drag and drop 5 mL distilled water to test tube X. 
• Show a solution of pink colour formed inside test tube x. 
• Drag and drop the solution in test tube X to 5 different test tubes (1.5 ml each) labelled as A, B, C, D and E, respectively. 
• Drag and drop 2 ml of water to test tube A. 
• Drag and drop 1.5 ml of water to test tube B. 
• Drag and drop 1 ml of water to test tube C. 
• Drag and drop 0.5 ml of water to test tube D. 
• Drag and drop 0.5 ml of conc. HCl to test tube A. 
• Show an alert “Use conc. HCl carefully.” 
• Show solution in test tube A turns light blue colour. 
• Drag and drop 1 ml of conc. HCl to test tube B.
• Show solution in test tube B turns light blue colour. 
• Drag and drop 1.5 ml of conc. HCl to test tube C. 
• Show solution in test tube C turns light blue colour. 
• Drag and drop 2 ml of conc. HCl to test tube D. 
• Show solution in test tube D turns light blue colour. 
• Drag and drop 2.5 ml of conc. HCl to test tube E. 
• Show solution in test tube E turns light blue colour. 
• Show inference “Addition of HCl results in the colour change of solution to light blue.”   

  

Observation

• Colour change of solution from blue to pink with increasing amount of water. 
• Colour change of solution from pink to light blue with increase in amount of HCl can be observed. 

Observations are given in the table;

Table :- Study of equilibrium shift when adding water

Table :- Study of equilibrium shift when adding Cl^– ions

Precaution 

• Use conc. HCl carefully. 
• Use only distilled water. 
• Handle Acetone or alcohol with care, since it is flammable.