Answer to Question #173989 in General Chemistry for sdfa

Question

Find the Reaction Equation:

Adding NH4SCN

Adding AgNO3

Increasing Temperature

Decreasing Temperature

Moving tube 4 to hot water

Moving tube 5 to ice water

 

In this experiment, iron (III) (Fe3+) reacts with thiocyanate ion (SCN-) to form the deep red complex ion, FeSCN2+. The intensity of red color tells if [FeSCN2+] changes.

You will make three changes to this equilibrium system:

• Adding solid ammonium thiocyanate (NH4SCN). NH4SCN is a soluble solid which will dissociate in water to form NH4+ ions and SCN- ions.
• Adding silver nitrate (AgNO3) which removes SCN- ions from the equilibrium system by forming an insoluble white precipitate.
• Heating and cooling the system.

Answer 1

Adding NH4SCN => right

Adding AgNO3=> left

Increasing Temperature=> right

Decreasing Temperature=> right