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Degree of Dissociation given Equilibrium Pressure Calculator

Degree of Dissociation Formula:

\[ \alpha = \sqrt{\frac{K_p}{K_p + P_{abs}}} \]

mol/m³
Pa

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1. What is Degree of Dissociation?

Definition: The Degree of Dissociation is the extent of generating current carrying free ions, which are dissociated from the fraction of solute at a given concentration.

Purpose: It helps chemists understand how much a compound dissociates into its ions under given pressure conditions.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ \alpha = \sqrt{\frac{K_p}{K_p + P_{abs}}} \]

Where:

Explanation: The formula calculates the fraction of molecules that dissociate at equilibrium based on the equilibrium constant and system pressure.

3. Importance of Degree of Dissociation

Details: Understanding dissociation is crucial for predicting chemical behavior, reaction rates, and equilibrium concentrations in various pressure conditions.

4. Using the Calculator

Tips: Enter the equilibrium constant (Kp) in mol/m³ and absolute pressure in Pascals. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What does a degree of dissociation of 1 mean?
A: A value of 1 means complete dissociation (100% of molecules have dissociated into ions).

Q2: How does pressure affect dissociation?
A: Increased pressure typically decreases the degree of dissociation for reactions where volume increases (Le Chatelier's principle).

Q3: What's a typical range for Kp values?
A: Kp values vary widely depending on the reaction and temperature, ranging from very small (10-10) to very large (1010) values.

Q4: Can this calculator be used for any dissociation reaction?
A: This specific formula applies to simple dissociation reactions where the stoichiometry matches the equation form.

Q5: What units should I use for pressure?
A: The calculator expects Pascals (Pa) for pressure, but you can convert from atm (1 atm = 101325 Pa) or bar (1 bar = 100000 Pa).

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