Answer to Question #174459 in General Chemistry for dafd

Question

Adding NH4SCN: Dark Red Solution

Adding AgNO3: Cloudy white Solution

Increasing Temperature: light orangish-yellow solution

Decreasing Temperature: (Darker orange)

Moving tube 4 to hot water: Light yellowish-orange

Moving tube 5 to ice water: Dark Orange

• Do observations support your prediction based on Le Chatelier’s Principle? Justify using Color evidence
• Direction the equilibrium shifted each time. Justify why equilibrium shifted in that direction.
• Based on the color change you observe, is the equilibrium for the solution in the ice water shifting left or right?
• Based on the color change you observe, is the equilibrium for the solution in the hot water shifting left or right?
• Do your observations indicate that the reaction is exothermic or endothermic? That is, based on your observations, is heat a product or a reactant? How do you know?
• What is the net ionic equation of this reaction with heat included in the equation?
• Are equilibrium shifts reversible? Justify using evidence from the lab.

Answer 1

AgNO3 + NH4SCN → AgSCN + NH4NO3

The process are thermally reverseable