Calculating the Equilibrium Constant (HSC SSCE Chemistry): Flashcards

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Measuring Equilibrium Constants
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What does ICE stand for in the ICE method?

Initial, Change, Equilibrium

Beer-Lambert law equation

A=εlcA = \varepsilon l c

What is AA in Beer-Lambert law?

Absorbance (no units, logarithmic ratio)

Relationship between absorbance and concentration

Directly proportional (A∝cA \propto c)

Why is colourimetry useful for measuring equilibrium?

Non-destructive (doesn't disturb equilibrium)

Two scenarios to calculate KeqK_{eq}

All eq. concs OR initial concs + one eq. conc

What's needed to determine KeqK_{eq}?

Balanced equation & concentration data

Colour of FeSCN²⁺ complex ion

Deep red

Formula for [Fe³⁺]eq using initial & [FeSCN²⁺]eq

[Fe³⁺]initial - [FeSCN²⁺]eq

Sig figs rule for KeqK_{eq} answer

Match least precise measurement in data

Explore HSC SSCE Chemistry Revision Notes by Topics

Qualitative Equilibrium

Calculating the Equilibrium Constant

Solution Equilibria

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Qualitative Equilibrium

Calculating the Equilibrium Constant

Solution Equilibria

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Qualitative Equilibrium

Calculating the Equilibrium Constant

Solution Equilibria

Explore HSC SSCE Chemistry Exam Questions by Topics

Qualitative Equilibrium

Calculating the Equilibrium Constant

Solution Equilibria

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