Number of Moles
n number of moles, m mass (g), M molar mass (g/mol).
n = m / M IB Middle Years Programme 2026
🧪 IB MYP Chemistry Formula Sheet
Essential formulas for atomic structure, stoichiometry, acids, bases, and chemical reactions across MYP Years 1-5.
Stoichiometry Acids & Bases Reactions
Master Chemical Calculations
This formula sheet covers fundamental chemistry relationships from MYP Years 1-5, helping you solve problems involving moles, concentrations, and chemical reactions.
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Mole calculations
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Chemical equations
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Concentration formulas
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Reaction relationships
Atomic Structure & Moles
Understanding atoms, molecules, and the mole concept for chemical calculations.
Number of Particles
N number of particles, n number of moles, N_A Avogadro's constant (6.02 × 10²³).
N = n × N_A Molar Mass
Sum of atomic masses of all atoms in a molecule.
Find atomic masses from periodic table, then add them together.
Topic Focus
The Mole Concept
- One mole = 6.02 × 10²³ particles (atoms, molecules, or ions).
- Molar mass is the mass of one mole of a substance (units: g/mol).
- Use n = m/M to convert between mass and moles in calculations.
Concentration & Solutions
Calculating concentrations and working with solutions.
Concentration (Molarity)
c concentration (mol/dm³), n number of moles, V volume (dm³).
c = n / V Mass Concentration
Mass of solute per unit volume of solution.
Mass Concentration = (Mass of Solute) / (Volume of Solution) Percentage by Mass
Mass of solute as percentage of total solution mass.
% by Mass = (Mass of Solute / Mass of Solution) × 100% Topic Focus
Solution Calculations
- Molarity (M) = moles per liter (mol/dm³). Always convert volumes to dm³ before calculating.
- Dilution: when adding water, moles stay constant, so c₁V₁ = c₂V₂.
- Percentage by mass is useful for comparing different solutions.
Chemical Reactions & Stoichiometry
Balancing equations and calculating quantities in chemical reactions.
Percentage Yield
Actual yield vs theoretical yield from balanced equation.
% Yield = (Actual Yield / Theoretical Yield) × 100% Reacting Masses
Use mole ratios from balanced chemical equations.
Step 1: Balance equation. Step 2: Convert masses to moles. Step 3: Use mole ratio. Step 4: Convert back to mass.
Topic Focus
Stoichiometric Calculations
- Always start with a balanced chemical equation.
- Use mole ratios from the equation to find relationships between reactants and products.
- Percentage yield shows how efficient a reaction is (actual vs. theoretical).
Acids, Bases & pH
Understanding acidity, basicity, and pH calculations.
pH Scale
[H⁺] hydrogen ion concentration (mol/dm³).
pH = -log₁₀[H⁺] Neutralization
Acid + Base → Salt + Water
pH = 7 is neutral, pH < 7 is acidic, pH > 7 is basic.
Topic Focus
pH & Acidity
- pH scale ranges from 0 (very acidic) to 14 (very basic), with 7 as neutral.
- Lower pH = higher [H⁺] = more acidic. Higher pH = lower [H⁺] = more basic.
- Each pH unit represents a 10× change in [H⁺] concentration.
How to Use This Formula Sheet
Boost your Cambridge exam confidence with these proven study strategies from our tutoring experts.
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Balance Equations First
Always balance chemical equations before doing stoichiometric calculations. Check atom counts on both sides.
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Check Units
Ensure units are consistent: convert mL to dm³, grams to moles, etc. before calculating.
Master MYP Chemistry
Build strong chemistry foundations with expert MYP tutors who help you understand chemical concepts and solve problems confidently.
Formulas align with IB MYP Chemistry curriculum for Years 1-5 (ages 11-16).
Always show your working, include units, and check that chemical equations are balanced.