Le Chatelier's Principle
When a system at equilibrium is subjected to change in concentration, pressure, or temperature, the system shifts in the direction that counteracts the change.
Grade 11th · Chemistry · Equilibrium
Chemical Equilibrium: Kc, Kp & Le Chatelier's Principle: Formula Cheat Sheet & Solved Numericals
Complete formula reference, variable dimensions, numerical step-by-step problem-solving templates, and sample calculations. covering Chemical Equilibrium: Kc, Kp & Le Chatelier's Principle for Class 11th Chemistry.
Science StreamAdvanced Level
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Essential Formulas & Mathematical Definitions
Kp = Kc · (RT)^Δng
pH = pKa + log([Salt]/[Acid])
Solubility Product: Ksp = [Aⁿ⁺]ˣ [Bᵐ⁻]ʸ
Buffer Solutions & Common Ion Effect
Acidic buffer (weak acid + conjugate salt) resists pH changes upon addition of small amounts of strong acid/base via Henderson-Hasselbalch equation.
Equilibrium — Formula Cheat Sheet & Solved Numericals
Detailed educational reference for Chemical Equilibrium: Kc, Kp & Le Chatelier's Principle. Designed for Class 11th students preparing for board exams and competitive entrance tests.
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Exam Day Revision & Problem Solving Checklist
- ✓Increasing pressure shifts equilibrium toward side with fewer gas moles (Δng)
- ✓Catalysts accelerate forward and reverse rates equally without changing equilibrium constant K
- ✓Review Formula Cheat Sheet & Solved Numericals before tackling multi-step practice questions
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High-Yield Exam Strategy & Scoring Tips
Step-by-Step Mark Allocation
Always state the governing principle or formula first, write given values with standard SI units, substitute clearly, and highlight the final numerical answer with units in a box for full step marking.
Common Calculation Traps
Watch for unit prefixes (cm to m, minutes to seconds, g to kg, degrees to radians). In coordinate and ray optics problems, double-check Cartesian sign conventions before computing.
Recommended Practice & Calculation Tools
Test your understanding and perform instant calculations with these free online utilities.
Chemistry Molar Mass & Solution Molarity Calculator
Find molecular mass from chemical formulas (H2SO4, NaCl, C6H12O6) and calculate solution concentration and dilution.
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Frequently Asked Exam Questions & Concept Clarifications
Why does temperature change alter equilibrium constant K?
By Van 't Hoff equation, equilibrium constant K increases with temperature for endothermic reactions (ΔH>0) and decreases for exothermic reactions (ΔH<0).