We are starting on equilibrium constant & the Le Chaleiter Principle. Can you please explain how...

We are starting on equilibrium constant & the Le Chaleiter Principle. Can you please explain how to work these problems, so that I can better understand, and be able to answer the remainder of the questions going forward?

Fe³⁺ + SCN^- FeSCN²⁺

(colorless) (red)

Naming: iron(III) ion (Fe³⁺); thiocyanate anion (SCN^1-); ferrithiocyanate (FeSCN²⁺), a red complex cation.

Part 1: When Fe(NO₃)₃ was added to the system,

Write the equilibrium constant, K_c .
Which ion in the equilibrium system caused the "stress"?
Which way did the equilibrium shift?
What happened to the concentration of SCN^-?
What happened to the concentration of FeSCN²⁺?

Part 2: When NaSCN was added to the system,

Which ion in the equilibrium system caused the "stress"?
Which way did the equilibrium shift?
What happened to the concentration of Fe³⁺?
What happened to the concentration of FeSCN²⁺?

Part 3: When AgNO₃ was added to the system, it caused the precipitation of solid AgSCN.

Which ion in the equilibrium had its concentration changed by addition of AgNO₃?
Did the concentration of that ion increase or decrease?
When AgNO₃ was added, which way did the equilibrium shift?

What happen to the color of the solution?

Solutions

Expert Solution

Note: left to right side shift of equilibrium = forward direction shift of equilibrium

right to left side shift of equilibrium = backward direction or reverse direction shift of equilibrium

Let me know if you have any queries regarding this.

queen_honey_blossom answered 1 year ago

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