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Understanding Stoichiometry Through Cake Baking: A Chemistry Approach

In this introductory chemistry guide by Mr. D. Patterson, students will explore the concept of stoichiometry using a fun real-world example: baking a cake. By analyzing the balanced chemical equation for cake ingredients—2 eggs, 1 milk, and 2 flour for 1 cake—learn how to determine the molar relationships between reactants and products. Practical problems will illustrate how to calculate the required amounts for multiple cakes or moles of substances, enhancing understanding of mole ratios in chemical reactions.

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Understanding Stoichiometry Through Cake Baking: A Chemistry Approach

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  1. Year 10 C Pathway Mr. D. Patterson Introductory chemistry

  2. Outcomes • Use the coefficients in a balanced chemical equation to write the mole relationship for the molar amounts of any two substances appearing in a balanced chemical equation.

  3. Baking a cake • My Gran’s wonderful chocolate cake requires 2 eggs, 1 milk and 2 flour to make 1 cake. • As a chemical reaction? 2 Egg + Milk + 2 Flour -> Cake

  4. Baking a cake 2 Egg + Milk + 2 Flour -> Cake • How many eggs do I need for 3 cakes? • How many cakes could I make from 3 milk if I had enough of the other ingredients? • How did you answer these questions?

  5. Stoichiometry 2 Egg + Milk + 2 Flour -> Cake • How many eggs do I need for 3 cakes?

  6. Stoichiometry • To find the number of moles of an unknown product or reactant from a chemical equation:

  7. Example Problem • How many moles of HCl are required to produce 4.5 moles of hydrogen gas?

  8. Example Problem • How many moles of MgCl are produced when 8 moles of Mg are used?

  9. Outcomes • Use the coefficients in a balanced chemical equation to write the mole relationship for the molar amounts of any two substances appearing in a balanced chemical equation. • Checkpoint 10.3 • Set 21

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