Welcome to the Stoichiometry Quiz!
Configure your quiz using the settings panel on the left, then click "Start Quiz" to begin.
This quiz will help you practice:
- Balancing chemical equations
- Mole-to-mole conversions
- Mass-to-mass calculations
- Limiting reactant problems
- Percent yield calculations
Your Quiz Results
Complete the quiz to see your results.
Stoichiometry Basics
Key Concepts
- Balanced Equations: Foundation of stoichiometry
- Mole Ratios: Derived from coefficients in chemical equations
- Conversions:
- Grams ⇌ Moles ⇌ Molecules ⇌ Liters (at STP)
- Limiting Reagent: Determines maximum product
- Percent Yield:
\[ \text{Percent Yield} = \left( \frac{\text{Actual Yield}}{\text{Theoretical Yield}} \right) \times 100 \]
Example Problems
Balancing Equations
Balance: __ H₂ + __ O₂ → __ H₂O
Solution: 2H₂ + 1O₂ → 2H₂O
Mole-Mole Conversion
How many moles of O₂ are needed to burn 2 moles of CH₄? (CH₄ + 2O₂ → CO₂ + 2H₂O)
Solution: 4 moles (2 moles CH₄ × 2 moles O₂/1 mole CH₄)
Mass-Mass Conversion
What mass of CO₂ is produced from 22g of CH₄?
Solution: Convert grams CH₄ to moles, use mole ratio to find moles CO₂, then convert to grams CO₂
Limiting Reactant
Given 4g H₂ and 32g O₂, which is the limiting reactant?
Solution: H₂ (convert both to moles and compare to reaction ratio)
Percent Yield
If 10g of NaCl is expected but only 8g is obtained, what is the percent yield?
Solution: (8g/10g) × 100 = 80%
How to Use This Tool
- Click "Start Quiz" to begin.
- Answer multiple-choice and calculation questions.
- Use a calculator for mass-mole problems if needed.
- Get instant feedback and detailed solutions (if enabled).
- View your category-wise performance in charts.
- Retry for better accuracy.